Merge pull request #14716 from blankmaker/docs/fix-12563

Fix #12563: Elaborate that popover('show') checks title/content

docs/_includes/js/popovers.html

@@ -246,7 +246,7 @@ sagittis lacus vel augue laoreet rutrum faucibus.">
   <p>Initializes popovers for an element collection.</p>
 
   <h4>.popover('show')</h4>
-  <p>Reveals an element's popover.</p>
+  <p>Reveals an element's popover. Popovers whose both title and content are zero-length are never displayed.</p>
   {% highlight js %}$('#element').popover('show'){% endhighlight %}
 
   <h4>.popover('hide')</h4>

docs/_includes/js/tooltips.html

@@ -207,7 +207,7 @@ $('#example').tooltip(options)
   <p>Attaches a tooltip handler to an element collection.</p>
 
   <h4>.tooltip('show')</h4>
-  <p>Reveals an element's tooltip.</p>
+  <p>Reveals an element's tooltip. Tooltips with zero-length titles are never displayed.</p>
   {% highlight js %}$('#element').tooltip('show'){% endhighlight %}
 
   <h4>.tooltip('hide')</h4>