Merge branch 'v4' of https://github.com/twbs/derpstrap into v4

.gitignore

 # Ignore docs files
 _gh_pages
 _site
+
+# Ignore ruby files
 .ruby-version
-Gemfile.lock
+.bundle
+vendor/cache
 
 # Numerous always-ignore extensions
 *.diff
@@ -41,6 +44,9 @@ validation-status.json
 # SCSS-Lint
 scss-lint-report.xml
 
+# grunt-contrib-sass cache
+.sass-cache
+
 # Folders to ignore
 bower_components
 node_modules

.travis.yml

@@ -15,15 +15,12 @@ before_install:
 install:
   - npm install -g grunt-cli
   - ./test-infra/s3_cache.py download npm-modules
-  - if [ "$TWBS_TEST" = validate-html ] && [ $TWBS_DO_VALIDATOR -ne 0 ]; then ./test-infra/s3_cache.py download rubygems; fi
+  - if [ -n "$BUNDLE_GEMFILE" ]; then ./test-infra/s3_cache.py download rubygems; fi
 after_script:
   - if [ "$TRAVIS_REPO_SLUG" != twbs-savage/bootstrap ] && [ "$TWBS_TEST" = core ]; then ./test-infra/s3_cache.py upload npm-modules; fi
-  - if [ "$TRAVIS_REPO_SLUG" != twbs-savage/bootstrap ] && [ "$TWBS_TEST" = validate-html ] && [ $TWBS_DO_VALIDATOR -ne 0 ]; then ./test-infra/s3_cache.py upload rubygems; fi
+  - if [ "$TRAVIS_REPO_SLUG" != twbs-savage/bootstrap ] && [ -n "$BUNDLE_GEMFILE" ]; then ./test-infra/s3_cache.py upload rubygems; fi
 env:
   global:
-    - JEKYLL_VERSION="2.5.1"
-    - ROUGE_VERSION="1.7.2"
-    - SCSS_LINT_VERSION="0.30.0"
     - SAUCE_USERNAME="bootstrap"
     - secure: "pJkBwnuae9dKU5tEcCqccfS1QQw7/meEcfz63fM7ba7QJNjoA6BaXj08L5Z3Vb5vBmVPwBawxo5Hp0jC0r/Z/O0hGnAmz/Cz09L+cy7dSAZ9x4hvZePSja/UAusaB5ogMoO8l2b773MzgQeSmrLbExr9BWLeqEfjC2hFgdgHLaQ="
     - secure: "gqjqISbxBJK6byFbsmr1AyP1qoWH+rap06A2gI7v72+Tn2PU2nYkIMUkCvhZw6K889jv+LhQ/ybcBxDOXHpNCExCnSgB4dcnmYp+9oeNZb37jSP0rQ+Ib4OTLjzc3/FawE/fUq5kukZTC7porzc/k0qJNLAZRx3YLALmK1GIdUY="
@@ -35,8 +32,9 @@ env:
     - secure: "PabpUdG2dE40hHUkMCdxk1e9Ak3BOo0h7Y5/uekosLKOz5N60Xmn/ooyrSkvicLthXO4cfONFhO3/xSVRKQOxlUw4on5i0VuNK+QSqxJk0IDaRSZnTCcC8J7083K0YL+FvMdGQwcYwMY9LiwS8aS014IRkSQjsa+mjo3owP+dOU="
     - secure: "G4/f4PVyVi9o6UbZMqw9YFmDu7cHqe9iymiXYd1RcnPXwhWAePX12m0PWMhUj5itJ180PTEddVip8PNOgBdqyrDxEPKkcgAW2EElVAPIKJXVfvDW64UjQ0H7NS7XvF7iLQUJp/XfmR7NJ7tT393AQdh8SGmuQpJhgYbwIWbES/k="
   matrix:
-    - TWBS_TEST=core
-    - TWBS_TEST=validate-html
+    - TWBS_TEST=core TWBS_SASS=libsass BUNDLE_GEMFILE=test-infra/gemfiles/core.gemfile
+    - TWBS_TEST=core TWBS_SASS=sass    BUNDLE_GEMFILE=test-infra/gemfiles/core.gemfile
+    - TWBS_TEST=validate-html BUNDLE_GEMFILE=Gemfile
     - TWBS_TEST=sauce-js-unit
 matrix:
   fast_finish: true

Gemfile

+# Ruby Gems for building and testing Bootstrap
+# Run `grunt update-gemfile-lock` to update to the latest compatible versions
+
 source 'https://rubygems.org'
 
-group :development do
+group :development, :test do
   gem 'jekyll', '~> 2.5.2'
   gem 'rouge', '~> 1.7.4'
+  gem 'sass', '~> 3.4.9'
+  gem 'scss-lint', '~> 0.31'
 end

Gemfile.lock

+GEM
+  remote: https://rubygems.org/
+  specs:
+    blankslate (2.1.2.4)
+    celluloid (0.16.0)
+      timers (~> 4.0.0)
+    classifier-reborn (2.0.2)
+      fast-stemmer (~> 1.0)
+    coffee-script (2.3.0)
+      coffee-script-source
+      execjs
+    coffee-script-source (1.8.0)
+    colorator (0.1)
+    execjs (2.2.2)
+    fast-stemmer (1.0.2)
+    ffi (1.9.6)
+    hitimes (1.2.2)
+    jekyll (2.5.2)
+      classifier-reborn (~> 2.0)
+      colorator (~> 0.1)
+      jekyll-coffeescript (~> 1.0)
+      jekyll-gist (~> 1.0)
+      jekyll-paginate (~> 1.0)
+      jekyll-sass-converter (~> 1.0)
+      jekyll-watch (~> 1.1)
+      kramdown (~> 1.3)
+      liquid (~> 2.6.1)
+      mercenary (~> 0.3.3)
+      pygments.rb (~> 0.6.0)
+      redcarpet (~> 3.1)
+      safe_yaml (~> 1.0)
+      toml (~> 0.1.0)
+    jekyll-coffeescript (1.0.1)
+      coffee-script (~> 2.2)
+    jekyll-gist (1.1.0)
+    jekyll-paginate (1.1.0)
+    jekyll-sass-converter (1.3.0)
+      sass (~> 3.2)
+    jekyll-watch (1.2.0)
+      listen (~> 2.7)
+    kramdown (1.5.0)
+    liquid (2.6.1)
+    listen (2.8.4)
+      celluloid (>= 0.15.2)
+      rb-fsevent (>= 0.9.3)
+      rb-inotify (>= 0.9)
+    mercenary (0.3.5)
+    parslet (1.5.0)
+      blankslate (~> 2.0)
+    posix-spawn (0.3.9)
+    pygments.rb (0.6.0)
+      posix-spawn (~> 0.3.6)
+      yajl-ruby (~> 1.1.0)
+    rainbow (2.0.0)
+    rb-fsevent (0.9.4)
+    rb-inotify (0.9.5)
+      ffi (>= 0.5.0)
+    redcarpet (3.2.2)
+    rouge (1.7.4)
+    safe_yaml (1.0.4)
+    sass (3.4.9)
+    scss-lint (0.31.0)
+      rainbow (~> 2.0)
+      sass (~> 3.4.1)
+    timers (4.0.1)
+      hitimes
+    toml (0.1.2)
+      parslet (~> 1.5.0)
+    yajl-ruby (1.1.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  jekyll (~> 2.5.2)
+  rouge (~> 1.7.4)
+  sass (~> 3.4.9)
+  scss-lint (~> 0.31)

Gruntfile.js

@@ -17,6 +17,7 @@ module.exports = function (grunt) {
 
   var fs = require('fs');
   var path = require('path');
+  var glob = require('glob');
   var npmShrinkwrap = require('npm-shrinkwrap');
 
   var generateCommonJSModule = require('./grunt/bs-commonjs-generator.js');
@@ -144,25 +145,6 @@ module.exports = function (grunt) {
       files: 'js/tests/index.html'
     },
 
-    sass: {
-      options: {
-        includePaths: ['scss'],
-        precision: 6,
-        sourceComments: false,
-        sourceMap: true
-      },
-      core: {
-        files: {
-          'dist/css/<%= pkg.name %>.css': 'scss/<%= pkg.name %>.scss'
-        }
-      },
-      docs: {
-        files: {
-          'docs/assets/css/docs.min.css': 'docs/assets/scss/docs.scss'
-        }
-      }
-    },
-
     scsslint: {
       scss: ['scss/*.scss', '!scss/_normalize.scss'],
       options: {
@@ -342,13 +324,23 @@ module.exports = function (grunt) {
     exec: {
       npmUpdate: {
         command: 'npm update'
+      },
+      bundleUpdate: {
+        command: function () {
+          // Update dev gems and all the test gemsets
+          return 'bundle update && ' + glob.sync('test-infra/gemfiles/*.gemfile').map(function (gemfile) {
+            return 'BUNDLE_GEMFILE=' + gemfile + ' bundle update';
+          }).join(' && ');
+        }
       }
     }
   });
 
 
   // These plugins provide necessary tasks.
-  require('load-grunt-tasks')(grunt, { scope: 'devDependencies' });
+  require('load-grunt-tasks')(grunt, { scope: 'devDependencies',
+    // Exclude Sass compilers. We choose the one to load later on.
+    pattern: ['grunt-*', '!grunt-sass', '!grunt-contrib-sass'] });
   require('time-grunt')(grunt);
 
   // Docs HTML validation task
@@ -366,7 +358,8 @@ module.exports = function (grunt) {
   // Skip core tests if running a different subset of the test suite
   if (runSubset('core') &&
     // Skip core tests if this is a Savage build
-    process.env.TRAVIS_REPO_SLUG !== 'twbs-savage/bootstrap') {    testSubtasks = testSubtasks.concat(['dist-css', 'dist-js', 'test-scss', 'test-js', 'docs']);
+    process.env.TRAVIS_REPO_SLUG !== 'twbs-savage/bootstrap') {
+    testSubtasks = testSubtasks.concat(['dist-css', 'dist-js', 'test-scss', 'test-js', 'docs']);
   }
   // Skip HTML validation if running a different subset of the test suite
   if (runSubset('validate-html') &&
@@ -392,7 +385,12 @@ module.exports = function (grunt) {
   grunt.registerTask('test-scss', ['scsslint:scss']);
 
   // CSS distribution task.
+  // Supported Compilers: sass (Ruby) and libsass.
+  (function (sassCompilerName) {
+    require('./grunt/bs-sass-compile/' + sassCompilerName + '.js')(grunt);
+  })(process.env.TWBS_SASS || 'libsass');
   grunt.registerTask('sass-compile', ['sass:core', 'sass:docs']);
+
   grunt.registerTask('dist-css', ['sass-compile', 'autoprefixer:core', 'usebanner', 'csscomb:dist', 'cssmin:core', 'cssmin:docs']);
 
   // Full distribution task.
@@ -435,4 +433,7 @@ module.exports = function (grunt) {
       done();
     });
   });
+  // Task for updating the cached RubyGem packages used by the Travis build (which are controlled by test-infra/Gemfile.lock).
+  // This task should be run and the updated file should be committed whenever Bootstrap's RubyGem dependencies change.
+  grunt.registerTask('update-gemfile-lock', ['exec:bundleUpdate']);
 };

dist/css/bootstrap.css

@@ -447,7 +447,7 @@ ul ul, ul ol, ol ul, ol ol {
   margin-bottom: 0;
 }
 
-.list-unstyled, .nav {
+.list-unstyled, .list-inline, .nav {
   padding-left: 0;
   list-style: none;
 }
@@ -607,7 +607,7 @@ pre code {
 }
 @media (min-width: 34em) {
   .container {
-    max-width: 34em;
+    max-width: 34rem;
   }
 }
 @media (min-width: 48em) {
@@ -620,6 +620,11 @@ pre code {
     max-width: 60rem;
   }
 }
+@media (min-width: 75em) {
+  .container {
+    max-width: 72.25rem;
+  }
+}
 
 .container-fluid {
   padding-right: .75rem; 
@@ -647,7 +652,7 @@ pre code {
   clear: both;
 }
 
-.col-xs-1, .col-sm-1, .col-md-1, .col-lg-1, .col-xl-1, .col-xs-2, .col-sm-2, .col-md-2, .col-lg-2, .col-xl-2, .col-xs-3, .col-sm-3, .col-md-3, .col-lg-3, .col-xl-3, .col-xs-4, .col-sm-4, .col-md-4, .col-lg-4, .col-xl-4, .col-xs-5, .col-sm-5, .col-md-5, .col-lg-5, .col-xl-5, .col-xs-6, .col-sm-6, .col-md-6, .col-lg-6, .col-xl-6, .col-xs-7, .col-sm-7, .col-md-7, .col-lg-7, .col-xl-7, .col-xs-8, .col-sm-8, .col-md-8, .col-lg-8, .col-xl-8, .col-xs-9, .col-sm-9, .col-md-9, .col-lg-9, .col-xl-9, .col-xs-10, .col-sm-10, .col-md-10, .col-lg-10, .col-xl-10, .col-xs-11, .col-sm-11, .col-md-11, .col-lg-11, .col-xl-11, .col-xs-12, .col-sm-12, .col-md-12, .col-lg-12, .col-xl-12 {
+.col-xs-1, .col-xs-2, .col-xs-3, .col-xs-4, .col-xs-5, .col-xs-6, .col-xs-7, .col-xs-8, .col-xs-9, .col-xs-10, .col-xs-11, .col-xs-12, .col-sm-1, .col-sm-2, .col-sm-3, .col-sm-4, .col-sm-5, .col-sm-6, .col-sm-7, .col-sm-8, .col-sm-9, .col-sm-10, .col-sm-11, .col-sm-12, .col-md-1, .col-md-2, .col-md-3, .col-md-4, .col-md-5, .col-md-6, .col-md-7, .col-md-8, .col-md-9, .col-md-10, .col-md-11, .col-md-12, .col-lg-1, .col-lg-2, .col-lg-3, .col-lg-4, .col-lg-5, .col-lg-6, .col-lg-7, .col-lg-8, .col-lg-9, .col-lg-10, .col-lg-11, .col-lg-12, .col-xl-1, .col-xl-2, .col-xl-3, .col-xl-4, .col-xl-5, .col-xl-6, .col-xl-7, .col-xl-8, .col-xl-9, .col-xl-10, .col-xl-11, .col-xl-12 {
   position: relative;
   min-height: 1px;
   padding-right: .75rem; 
@@ -1492,7 +1497,7 @@ pre code {
   }
 }
 
-@media (min-width: 62em) {
+@media (min-width: 75em) {
   .col-xl-1, .col-xl-2, .col-xl-3, .col-xl-4, .col-xl-5, .col-xl-6, .col-xl-7, .col-xl-8, .col-xl-9, .col-xl-10, .col-xl-11, .col-xl-12 {
     float: left;
   }
@@ -2725,7 +2730,7 @@ input[type="submit"].btn-block, input[type="reset"].btn-block, input[type="butto
   z-index: 990;
 }
 
-.pull-right > .dropdown-menu, .navbar-right > .dropdown-menu {
+.pull-right > .dropdown-menu {
   right: 0;
   left: auto;
 }
@@ -3485,7 +3490,12 @@ input[type="submit"].btn-block, input[type="reset"].btn-block, input[type="butto
 }
 
 @media (min-width: 34em) {
+  .navbar-left {
+    float: left !important;
+  }
+
   .navbar-right {
+    float: right !important;
     margin-right: -1rem;
   }
   .navbar-right ~ .navbar-right {
@@ -3990,7 +4000,7 @@ a.label:hover, a.label:focus {
 .badge:empty {
   display: none;
 }
-.badge.pull-left, .badge.navbar-left, .badge.pull-right, .badge.navbar-right {
+.badge.pull-left, .badge.pull-right {
   top: .2em;
 }
 .list-group-item.active > .badge, .nav-pills > .active > a > .badge {
@@ -4322,11 +4332,11 @@ a.badge:hover, a.badge:focus {
   display: block;
 }
 
-.media-right, .media > .pull-right, .media > .navbar-right {
+.media-right, .media > .pull-right {
   padding-left: 10px;
 }
 
-.media-left, .media > .pull-left, .media > .navbar-left {
+.media-left, .media > .pull-left {
   padding-right: 10px;
 }
 
@@ -4705,19 +4715,23 @@ a.list-group-item-state.active, a.list-group-item-state.active:hover, a.list-gro
 .tooltip.in {
   opacity: .9;
 }
-.tooltip.top {
+
+.tooltip-top {
   padding: 5px 0;
   margin-top: -3px;
 }
-.tooltip.right {
+
+.tooltip-right {
   padding: 0 5px;
   margin-left: 3px;
 }
-.tooltip.bottom {
+
+.tooltip-bottom {
   padding: 5px 0;
   margin-top: 3px;
 }
-.tooltip.left {
+
+.tooltip-left {
   padding: 0 5px;
   margin-left: -3px;
 }
@@ -4740,62 +4754,37 @@ a.list-group-item-state.active, a.list-group-item-state.active:hover, a.list-gro
   border-style: solid;
 }
 
-.tooltip.top .tooltip-arrow {
+.tooltip-top .tooltip-arrow {
   bottom: 0;
   left: 50%;
   margin-left: -5px;
   border-width: 5px 5px 0;
   border-top-color: #000;
 }
-.tooltip.top-left .tooltip-arrow {
-  right: 5px;
-  bottom: 0;
-  margin-bottom: -5px;
-  border-width: 5px 5px 0;
-  border-top-color: #000;
-}
-.tooltip.top-right .tooltip-arrow {
-  bottom: 0;
-  left: 5px;
-  margin-bottom: -5px;
-  border-width: 5px 5px 0;
-  border-top-color: #000;
-}
-.tooltip.right .tooltip-arrow {
+
+.tooltip-right .tooltip-arrow {
   top: 50%;
   left: 0;
   margin-top: -5px;
   border-width: 5px 5px 5px 0;
   border-right-color: #000;
 }
-.tooltip.left .tooltip-arrow {
+
+.tooltip-left .tooltip-arrow {
   top: 50%;
   right: 0;
   margin-top: -5px;
   border-width: 5px 0 5px 5px;
   border-left-color: #000;
 }
-.tooltip.bottom .tooltip-arrow {
+
+.tooltip-bottom .tooltip-arrow {
   top: 0;
   left: 50%;
   margin-left: -5px;
   border-width: 0 5px 5px;
   border-bottom-color: #000;
 }
-.tooltip.bottom-left .tooltip-arrow {
-  top: 0;
-  right: 5px;
-  margin-top: -5px;
-  border-width: 0 5px 5px;
-  border-bottom-color: #000;
-}
-.tooltip.bottom-right .tooltip-arrow {
-  top: 0;
-  left: 5px;
-  margin-top: -5px;
-  border-width: 0 5px 5px;
-  border-bottom-color: #000;
-}
 
 .popover {
   position: absolute;
@@ -4819,16 +4808,20 @@ a.list-group-item-state.active, a.list-group-item-state.active:hover, a.list-gro
   -webkit-box-shadow: 0 5px 10px rgba(0, 0, 0, .2);
           box-shadow: 0 5px 10px rgba(0, 0, 0, .2);
 }
-.popover.top {
+
+.popover-top {
   margin-top: -10px;
 }
-.popover.right {
+
+.popover-right {
   margin-left: 10px;
 }
-.popover.bottom {
+
+.popover-bottom {
   margin-top: 10px;
 }
-.popover.left {
+
+.popover-left {
   margin-left: -10px;
 }
 
@@ -4845,7 +4838,7 @@ a.list-group-item-state.active, a.list-group-item-state.active:hover, a.list-gro
   padding: 9px 14px;
 }
 
-.popover > .arrow, .popover > .arrow:after {
+.popover-arrow, .popover-arrow:after {
   position: absolute;
   display: block;
   width: 0;
@@ -4854,65 +4847,68 @@ a.list-group-item-state.active, a.list-group-item-state.active:hover, a.list-gro
   border-style: solid;
 }
 
-.popover > .arrow {
+.popover-arrow {
   border-width: 11px;
 }
 
-.popover > .arrow:after {
+.popover-arrow:after {
   content: "";
   border-width: 10px;
 }
 
-.popover.top > .arrow {
+.popover-top > .popover-arrow {
   bottom: -11px;
   left: 50%;
   margin-left: -11px;
   border-top-color: rgba(0, 0, 0, .25);
   border-bottom-width: 0;
 }
-.popover.top > .arrow:after {
+.popover-top > .popover-arrow:after {
   bottom: 1px;
   margin-left: -10px;
   content: "";
   border-top-color: #fff;
   border-bottom-width: 0;
 }
-.popover.right > .arrow {
+
+.popover-right > .popover-arrow {
   top: 50%;
   left: -11px;
   margin-top: -11px;
   border-right-color: rgba(0, 0, 0, .25);
   border-left-width: 0;
 }
-.popover.right > .arrow:after {
+.popover-right > .popover-arrow:after {
   bottom: -10px;
   left: 1px;
   content: "";
   border-right-color: #fff;
   border-left-width: 0;
 }
-.popover.bottom > .arrow {
+
+.popover-bottom > .popover-arrow {
   top: -11px;
   left: 50%;
   margin-left: -11px;
   border-top-width: 0;
   border-bottom-color: rgba(0, 0, 0, .25);
 }
-.popover.bottom > .arrow:after {
+.popover-bottom > .popover-arrow:after {
   top: 1px;
   margin-left: -10px;
   content: "";
   border-top-width: 0;
   border-bottom-color: #fff;
 }
-.popover.left > .arrow {
+
+.popover-left > .popover-arrow {
   top: 50%;
   right: -11px;
   margin-top: -11px;
   border-right-width: 0;
   border-left-color: rgba(0, 0, 0, .25);
 }
-.popover.left > .arrow:after {
+.popover-left > .popover-arrow:after {
   right: 1px;
   bottom: -10px;
   content: "";
@@ -5139,11 +5135,11 @@ a.list-group-item-state.active, a.list-group-item-state.active:hover, a.list-gro
   margin-left: auto;
 }
 
-.pull-right, .navbar-right {
+.pull-right {
   float: right !important;
 }
 
-.pull-left, .navbar-left {
+.pull-left {
   float: left !important;
 }
 

docs/_includes/js/popovers.html

@@ -39,24 +39,24 @@ $(function () {
   <h3>Static popover</h3>
   <p>Four options are available: top, right, bottom, and left aligned.</p>
   <div class="bs-example bs-example-popover">
-    <div class="popover top">
-      <div class="arrow"></div>
+    <div class="popover popover-top">
+      <div class="popover-arrow"></div>
       <h3 class="popover-title">Popover top</h3>
       <div class="popover-content">
         <p>Sed posuere consectetur est at lobortis. Aenean eu leo quam. Pellentesque ornare sem lacinia quam venenatis vestibulum.</p>
       </div>
     </div>
 
-    <div class="popover right">
-      <div class="arrow"></div>
+    <div class="popover popover-right">
+      <div class="popover-arrow"></div>
       <h3 class="popover-title">Popover right</h3>
       <div class="popover-content">
         <p>Sed posuere consectetur est at lobortis. Aenean eu leo quam. Pellentesque ornare sem lacinia quam venenatis vestibulum.</p>
       </div>
     </div>
 
-    <div class="popover bottom">
-      <div class="arrow"></div>
+    <div class="popover popover-bottom">
+      <div class="popover-arrow"></div>
       <h3 class="popover-title">Popover bottom</h3>
 
       <div class="popover-content">
@@ -64,8 +64,8 @@ $(function () {
       </div>
     </div>
 
-    <div class="popover left">
-      <div class="arrow"></div>
+    <div class="popover popover-left">
+      <div class="popover-arrow"></div>
       <h3 class="popover-title">Popover left</h3>
       <div class="popover-content">
         <p>Sed posuere consectetur est at lobortis. Aenean eu leo quam. Pellentesque ornare sem lacinia quam venenatis vestibulum.</p>
@@ -207,12 +207,12 @@ sagittis lacus vel augue laoreet rutrum faucibus.">
         <tr>
           <td>template</td>
           <td>string</td>
-          <td><code>'&lt;div class="popover" role="tooltip"&gt;&lt;div class="arrow"&gt;&lt;/div&gt;&lt;h3 class="popover-title"&gt;&lt;/h3&gt;&lt;div class="popover-content"&gt;&lt;/div&gt;&lt;/div&gt;'</code></td>
+          <td><code>'&lt;div class="popover" role="tooltip"&gt;&lt;div class="popover-arrow"&gt;&lt;/div&gt;&lt;h3 class="popover-title"&gt;&lt;/h3&gt;&lt;div class="popover-content"&gt;&lt;/div&gt;&lt;/div&gt;'</code></td>
           <td>
             <p>Base HTML to use when creating the popover.</p>
             <p>The popover's <code>title</code> will be injected into the <code>.popover-title</code>.</p>
             <p>The popover's <code>content</code> will be injected into the <code>.popover-content</code>.</p>
-            <p><code>.arrow</code> will become the popover's arrow.</p>
+            <p><code>.popover-arrow</code> will become the popover's arrow.</p>
             <p>The outermost wrapper element should have the <code>.popover</code> class.</p>
           </td>
         </tr>

docs/_includes/js/tooltips.html

@@ -12,25 +12,25 @@
   <h3>Static tooltip</h3>
   <p>Four options are available: top, right, bottom, and left aligned.</p>
   <div class="bs-example bs-example-tooltip">
-    <div class="tooltip left" role="tooltip">
+    <div class="tooltip tooltip-left" role="tooltip">
       <div class="tooltip-arrow"></div>
       <div class="tooltip-inner">
         Tooltip on the left
       </div>
     </div>
-    <div class="tooltip top" role="tooltip">
+    <div class="tooltip tooltip-top" role="tooltip">
       <div class="tooltip-arrow"></div>
       <div class="tooltip-inner">
         Tooltip on the top
       </div>
     </div>
-    <div class="tooltip bottom" role="tooltip">
+    <div class="tooltip tooltip-bottom" role="tooltip">
       <div class="tooltip-arrow"></div>
       <div class="tooltip-inner">
         Tooltip on the bottom
       </div>
     </div>
-    <div class="tooltip right" role="tooltip">
+    <div class="tooltip tooltip-right" role="tooltip">
       <div class="tooltip-arrow"></div>
       <div class="tooltip-inner">
         Tooltip on the right

docs/assets/js/src/application.js

@@ -10,6 +10,7 @@
  */
 
 /* global ZeroClipboard */
+/* global SimpleJekyllSearch */
 
 !function ($) {
   'use strict';

docs/components/card.md

@@ -21,7 +21,7 @@ Cards require very little markup, but do require some additional classes to give
 
 ### Text alignment
 
-You can quickly change the text alignment of any card—in it's entirety or specific parts—with our [text align classes]().
+You can quickly change the text alignment of any card—in its entirety or specific parts—with our [text align classes]().
 
 {% example html %}
 <div class="card">

docs/content/tables.md

@@ -3,7 +3,7 @@ layout: page
 title: Tables
 ---
 
-Due to the widespread use of tables across plugins like calendars and date pickers, we've designed our tables to be **opt-in**. Just add the base class `.table` to any `<table>`.
+Due to the widespread use of tables across third-party widgets like calendars and date pickers, we've designed our tables to be **opt-in**. Just add the base class `.table` to any `<table>`.
 
 ## Basic example
 

docs/examples/album/index.html

@@ -50,7 +50,7 @@
     <section class="jumbotron text-center">
       <div class="container">
         <h1 class="jumbotron-heading">Album example</h1>
-        <p class="lead text-muted">Something short and leading about the collection below—it's contents, the creator, etc. Make it short and sweet, but not too short so folks don't simply skip over it entirely.</p>
+        <p class="lead text-muted">Something short and leading about the collection below—its contents, the creator, etc. Make it short and sweet, but not too short so folks don't simply skip over it entirely.</p>
         <p>
           <a href="#" class="btn btn-primary">Main call to action</a>
           <a href="#" class="btn btn-secondary">Secondary action</a>

docs/examples/navbar-top/index.html

@@ -37,7 +37,7 @@
     <div class="container">
       <div class="jumbotron">
         <h1>Navbar example</h1>
-        <p class="lead">This example is a quick exercise to illustrate how the top-aligned navbar works. As you scroll, this navbar remains in it's original position and moves with the rest of the page.</p>
+        <p class="lead">This example is a quick exercise to illustrate how the top-aligned navbar works. As you scroll, this navbar remains in its original position and moves with the rest of the page.</p>
         <a class="btn btn-lg btn-primary" href="../../components/#navbar" role="button">View navbar docs &raquo;</a>
       </div>
     </div>

docs/examples/navbar/index.html

@@ -39,7 +39,7 @@
       <!-- Main component for a primary marketing message or call to action -->
       <div class="jumbotron">
         <h1>Navbar example</h1>
-        <p>This example is a quick exercise to illustrate how the default navbar works. It's placed within a <code>.container</code> to limit it's width and will scroll with the rest of the page's content.</p>
+        <p>This example is a quick exercise to illustrate how the default navbar works. It's placed within a <code>.container</code> to limit its width and will scroll with the rest of the page's content.</p>
         <p>
           <a class="btn btn-lg btn-primary" href="../../components/#navbar" role="button">View navbar docs &raquo;</a>
         </p>

docs/getting-started/compiling.md

@@ -13,11 +13,15 @@ From the command line:
 
 1. Install `grunt-cli` globally with `npm install -g grunt-cli`.
 2. Navigate to the root `/bootstrap` directory, then run `npm install`. npm will look at [package.json](https://github.com/twbs/bootstrap/blob/master/package.json) and automatically install the necessary local dependencies listed there.
+3. [Install Ruby][install-ruby], install [Bundler][gembundler] with `gem install bundler`, and finally run `bundle`. This will install all Ruby dependencies, such as Jekyll and Sass linter.
 
 When completed, you'll be able to run the various Grunt commands provided from the command line.
 
 **Unfamiliar with npm? Don't have node installed?** That's a-okay. npm stands for [node packaged modules](http://npmjs.org/) and is a way to manage development dependencies through node.js. [Download and install node.js](http://nodejs.org/download/) before proceeding.
 
+[install-ruby]: https://www.ruby-lang.org/en/documentation/installation/
+[gembundler]: http://bundler.io/
+
 ### Available Grunt commands
 
 #### Build - `grunt`
@@ -35,6 +39,20 @@ Builds and tests CSS, JavaScript, and other assets which are used when running t
 #### Watch - `grunt watch`
 This is a convenience method for watching just Sass files and automatically building them whenever you save.
 
+### Use another Sass compiler
+Bootstrap is compiled with [libsass][libsass] by default.
+Use another compiler by setting the `TWBS_SASS` environment variable to:
+
+* `sass` to use [Ruby Sass][ruby-sass] via [grunt-contrib-sass][grunt-contrib-sass].
+* `libsass` (default) to use [libsass][libsass] via [grunt-sass][grunt-sass].
+
+For example, run `TWBS_SASS=sass grunt` to test and build Bootstrap with Ruby Sass.
+
+[ruby-sass]: https://github.com/sass/sass
+[grunt-contrib-sass]: https://github.com/gruntjs/grunt-contrib-sass
+[libsass]: https://github.com/sass/libsass
+[grunt-sass]: https://github.com/sindresorhus/grunt-sass
+
 ### Troubleshooting dependencies
 
 Should you encounter problems with installing dependencies or running Grunt commands, uninstall all previous dependency versions (global and local). Then, rerun `npm install`.

docs/getting-started/quick-start.md

@@ -22,7 +22,7 @@ Then, add the Bootstrap JavaScript—and jQuery—near the end of your pages. It
 Be sure to have your pages set up with the latest design and development standards. That means:
 
 * Using an HTML5 doctype
-* Forcing Internet Explorer to use it's latest rendering mode ([read more]())
+* Forcing Internet Explorer to use its latest rendering mode ([read more]())
 * And, utilizing the viewport meta tag.
 
 Put it all together and your pages should look like this:

docs/getting-started/third-party-support.md

@@ -16,7 +16,7 @@ Depending on the context, you may override as-needed (Option 1) or reset the box
  *
  * Reset individual elements or override regions to avoid conflicts due to
  * global box model settings of Bootstrap. Two options, individual overrides and
- * region resets, are available as plain CSS and uncompiled Less formats.
+ * region resets, are available as plain CSS and uncompiled Sass formats.
  */
 
 /* Option 1A: Override a single element's box model via CSS */
@@ -26,7 +26,7 @@ Depending on the context, you may override as-needed (Option 1) or reset the box
           box-sizing: content-box;
 }
 
-/* Option 1B: Override a single element's box model by using a Bootstrap Less mixin */
+/* Option 1B: Override a single element's box model by using a Bootstrap Sass mixin */
 .element {
   .box-sizing(content-box);
 }
@@ -41,7 +41,7 @@ Depending on the context, you may override as-needed (Option 1) or reset the box
           box-sizing: content-box;
 }
 
-/* Option 2B: Reset an entire region with a custom Less mixin */
+/* Option 2B: Reset an entire region with a custom Sass mixin */
 .reset-box-sizing {
   &,
   *,

docs/index.html

@@ -25,9 +25,9 @@ title: Bootstrap · The world's most popular mobile-first and responsive f
 
     <div class="row">
       <div class="col-sm-4">
-        <img src="assets/img/sass-less.png" alt="Sass and Less support" class="img-responsive">
+        <img src="assets/img/sass-less.png" alt="Sass support" class="img-responsive">
         <h3>Preprocessors</h3>
-        <p>Bootstrap ships with vanilla CSS, but its source code utilizes the two most popular CSS preprocessors, <a href="../css/#less">Less</a> and <a href="../css/#sass">Sass</a>. Quickly get started with precompiled CSS or build on the source.</p>
+        <p>Bootstrap ships with vanilla CSS, but its source code utilizes <a href="../css/#sass">Sass</a>, a popular CSS preprocessor. Quickly get started with precompiled CSS or build on the source.</p>
       </div>
       <div class="col-sm-4">
         <img src="assets/img/devices.png" alt="Responsive across devices" class="img-responsive">

docs/javascript/alerts.md

@@ -22,7 +22,7 @@ When using a `.close` button, it must be the first child of the `.alert-dismissi
 {% example html %}
 <div class="alert alert-danger alert-dismissible fade in" role="alert">
   <button type="button" class="close" data-dismiss="alert"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button>
-  <h4>Oh snap! You got an error!</h4>
+  <h4 class="alert-heading">Oh snap! You got an error!</h4>
   <p>Change this and that and try again. Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Cras mattis consectetur purus sit amet fermentum.</p>
   <p>
     <button type="button" class="btn btn-danger">Take this action</button>

docs/javascript/carousel.md

@@ -37,8 +37,8 @@ A slideshow component for cycling through elements—images or slides of text—
 {% endexample %}
 
 <div class="bs-callout bs-callout-warning" id="callout-carousel-transitions">
-  <h4>Transition animations not supported in Internet Explorer 8 &amp; 9</h4>
-  <p>Bootstrap exclusively uses CSS3 for its animations, but Internet Explorer 8 &amp; 9 don't support the necessary CSS properties. Thus, there are no slide transition animations when using these browsers. We have intentionally decided not to include jQuery-based fallbacks for the transitions.</p>
+  <h4>Transition animations not supported in Internet Explorer 9</h4>
+  <p>Bootstrap exclusively uses CSS3 for its animations, but Internet Explorer 9 doesn't support the necessary CSS properties. Thus, there are no slide transition animations when using that browser. We have intentionally decided not to include jQuery-based fallbacks for the transitions.</p>
 </div>
 
 <div class="bs-callout bs-callout-warning" id="callout-carousel-active">