restore px unit on @font-size-base

docs/assets/css/bootstrap.css

@@ -342,7 +342,7 @@ p {
 
 .lead {
   margin-bottom: 20px;
-  font-size: 21;
+  font-size: 21px;
   font-weight: 200;
   line-height: 1.4;
 }
@@ -467,58 +467,58 @@ h6 {
 
 h1,
 .h1 {
-  font-size: 38.5;
+  font-size: 38.5px;
   font-size: 4rem;
 }
 
 h2,
 .h2 {
-  font-size: 31.5;
+  font-size: 31.5px;
   font-size: 3rem;
 }
 
 h3,
 .h3 {
-  font-size: 24.5;
+  font-size: 24.5px;
   font-size: 2.5rem;
 }
 
 h4,
 .h4 {
-  font-size: 17.5;
+  font-size: 17.5px;
   font-size: 2rem;
 }
 
 h5,
 .h5 {
-  font-size: 14;
+  font-size: 14px;
   font-size: 1.6rem;
 }
 
 h6,
 .h6 {
-  font-size: 11.9;
+  font-size: 11.9px;
   font-size: 1.2rem;
 }
 
 h1 small,
 .h1 small {
-  font-size: 24.5;
+  font-size: 24.5px;
 }
 
 h2 small,
 .h2 small {
-  font-size: 17.5;
+  font-size: 17.5px;
 }
 
 h3 small,
 .h3 small {
-  font-size: 14;
+  font-size: 14px;
 }
 
 h4 small,
 .h4 small {
-  font-size: 14;
+  font-size: 14px;
 }
 
 .page-header {
@@ -638,7 +638,7 @@ blockquote {
 
 blockquote p {
   margin-bottom: 0;
-  font-size: 17.5;
+  font-size: 17.5px;
   font-weight: 300;
   line-height: 1.25;
 }
@@ -692,7 +692,7 @@ code,
 pre {
   padding: 0 3px 2px;
   font-family: Monaco, Menlo, Consolas, "Courier New", monospace;
-  font-size: 12;
+  font-size: 12px;
   color: #333333;
   border-radius: 4px;
 }
@@ -709,7 +709,7 @@ pre {
   display: block;
   padding: 9.5px;
   margin: 0 0 10px;
-  font-size: 13;
+  font-size: 13px;
   line-height: 20px;
   word-break: break-all;
   word-wrap: break-word;
@@ -1167,7 +1167,7 @@ legend {
   width: 100%;
   padding: 0;
   margin-bottom: 20px;
-  font-size: 21;
+  font-size: 21px;
   line-height: 40px;
   color: #333333;
   border: 0;
@@ -1199,7 +1199,7 @@ input[type="color"] {
   display: inline-block;
   min-height: 34px;
   padding: 6px 9px;
-  font-size: 14;
+  font-size: 14px;
   line-height: 20px;
   color: #555555;
   vertical-align: middle;
@@ -1375,7 +1375,7 @@ input[type="search"].input-large,
 input[type="tel"].input-large,
 input[type="color"].input-large {
   padding: 11px 14px;
-  font-size: 17.5;
+  font-size: 17.5px;
   border-radius: 6px;
 }
 
@@ -1397,7 +1397,7 @@ input[type="tel"].input-small,
 input[type="color"].input-small {
   min-height: 26px;
   padding: 2px 10px;
-  font-size: 11.9;
+  font-size: 11.9px;
   border-radius: 3px;
 }
 
@@ -1594,7 +1594,7 @@ select:focus:invalid:focus {
 
 .input-group-addon {
   padding: 6px 8px;
-  font-size: 14;
+  font-size: 14px;
   font-weight: normal;
   line-height: 20px;
   text-align: center;
@@ -1608,12 +1608,12 @@ select:focus:invalid:focus {
 
 .input-group-addon.input-small {
   padding: 2px 10px;
-  font-size: 11.9;
+  font-size: 11.9px;
 }
 
 .input-group-addon.input-large {
   padding: 11px 14px;
-  font-size: 17.5;
+  font-size: 17.5px;
 }
 
 .input-group input:first-child,
@@ -1760,7 +1760,7 @@ select:focus:invalid:focus {
   display: inline-block;
   padding: 6px 12px;
   margin-bottom: 0;
-  font-size: 14;
+  font-size: 14px;
   font-weight: 500;
   line-height: 20px;
   text-align: center;
@@ -1804,19 +1804,19 @@ fieldset[disabled] .btn {
 
 .btn-large {
   padding: 11px 14px;
-  font-size: 17.5;
+  font-size: 17.5px;
   border-radius: 6px;
 }
 
 .btn-small {
   padding: 2px 10px;
-  font-size: 11.9;
+  font-size: 11.9px;
   border-radius: 3px;
 }
 
 .btn-mini {
   padding: 0 6px;
-  font-size: 10.5;
+  font-size: 10.5px;
   border-radius: 3px;
 }
 
@@ -3032,7 +3032,7 @@ a.list-group-item.active .list-group-item-text {
 .panel-heading {
   padding: 10px 15px;
   margin: -15px -15px 15px;
-  font-size: 17.5;
+  font-size: 17.5px;
   font-weight: 500;
   background-color: #f5f5f5;
   border-bottom: 1px solid #dddddd;
@@ -4049,7 +4049,7 @@ button.close {
 .pagination-large > li > a,
 .pagination-large > li > span {
   padding: 11px 14px;
-  font-size: 17.5;
+  font-size: 17.5px;
 }
 
 .pagination-large > li:first-child > a,
@@ -4083,13 +4083,13 @@ button.close {
 .pagination-small > li > a,
 .pagination-small > li > span {
   padding: 2px 10px;
-  font-size: 11.9;
+  font-size: 11.9px;
 }
 
 .pagination-mini > li > a,
 .pagination-mini > li > span {
   padding: 0 6px;
-  font-size: 10.5;
+  font-size: 10.5px;
 }
 
 .pager {

less/variables.less

@@ -45,7 +45,7 @@
 @font-family-monospace:   Monaco, Menlo, Consolas, "Courier New", monospace;
 @font-family-base:        @font-family-sans-serif;
 
-@font-size-base:          14;
+@font-size-base:          14px;
 @font-size-large:         (@font-size-base * 1.25); // ~18px
 @font-size-small:         (@font-size-base * 0.85); // ~12px
 @font-size-mini:          (@font-size-base * 0.75); // ~11px