Merge pull request #14257 from twbs/fix-14219

Document that empty tooltips+popovers do not get displayed

docs/_includes/js/popovers.html

@@ -3,6 +3,7 @@
 
   <h2 id="popovers-examples">Examples</h2>
   <p>Add small overlays of content, like those on the iPad, to any element for housing secondary information.</p>
+  <p>Popovers whose both title and content are zero-length are never displayed.</p>
 
   <div class="bs-callout bs-callout-danger">
     <h4>Plugin dependency</h4>

docs/_includes/js/tooltips.html

 <div class="bs-docs-section">
   <h1 id="tooltips" class="page-header">Tooltips <small>tooltip.js</small></h1>
+  <p>Inspired by the excellent jQuery.tipsy plugin written by Jason Frame; Tooltips are an updated version, which don't rely on images, use CSS3 for animations, and data-attributes for local title storage.</p>
+  <p>Tooltips with zero-length titles are never displayed.</p>
 
   <h2 id="tooltips-examples">Examples</h2>
-  <p>Inspired by the excellent jQuery.tipsy plugin written by Jason Frame; Tooltips are an updated version, which don't rely on images, use CSS3 for animations, and data-attributes for local title storage.</p>
   <p>Hover over the links below to see tooltips:</p>
   <div class="bs-example tooltip-demo">
     <p class="muted" style="margin-bottom: 0;">Tight pants next level keffiyeh <a href="#" data-toggle="tooltip" title="Default tooltip">you probably</a> haven't heard of them. Photo booth beard raw denim letterpress vegan messenger bag stumptown. Farm-to-table seitan, mcsweeney's fixie sustainable quinoa 8-bit american apparel <a href="#" data-toggle="tooltip" title="Another tooltip">have a</a> terry richardson vinyl chambray. Beard stumptown, cardigans banh mi lomo thundercats. Tofu biodiesel williamsburg marfa, four loko mcsweeney's cleanse vegan chambray. A really ironic artisan <a href="#" data-toggle="tooltip" title="Another one here too">whatever keytar</a>, scenester farm-to-table banksy Austin <a href="#" data-toggle="tooltip" title="The last tip!">twitter handle</a> freegan cred raw denim single-origin coffee viral.