fixes #4586: typo in docs

docs/base-css.html

@@ -1756,7 +1756,7 @@ For example, <code><section></code> should be wrapped as inlin
           </ul>
 
           <h3>Glyphicons attribution</h3>
-          <p><a href="http://glyphicons.com/">Glyphicons</a> Halflings are normally not available for free, but an arrangement between Bootstrap and the Glyphicons creators have made this possible at not cost to you as developers. As a thank you, we ask you to include an optional link back to <a href="http://glyphicons.com/">Glyphicons</a> whenever practical.</p>
+          <p><a href="http://glyphicons.com/">Glyphicons</a> Halflings are normally not available for free, but an arrangement between Bootstrap and the Glyphicons creators have made this possible at no cost to you as developers. As a thank you, we ask you to include an optional link back to <a href="http://glyphicons.com/">Glyphicons</a> whenever practical.</p>
 
 
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docs/templates/pages/base-css.mustache

@@ -1693,7 +1693,7 @@
           </ul>
 
           <h3>Glyphicons attribution</h3>
-          <p>{{_i}}<a href="http://glyphicons.com/">Glyphicons</a> Halflings are normally not available for free, but an arrangement between Bootstrap and the Glyphicons creators have made this possible at not cost to you as developers. As a thank you, we ask you to include an optional link back to <a href="http://glyphicons.com/">Glyphicons</a> whenever practical.{{/i}}</p>
+          <p>{{_i}}<a href="http://glyphicons.com/">Glyphicons</a> Halflings are normally not available for free, but an arrangement between Bootstrap and the Glyphicons creators have made this possible at no cost to you as developers. As a thank you, we ask you to include an optional link back to <a href="http://glyphicons.com/">Glyphicons</a> whenever practical.{{/i}}</p>
 
 
           <hr class="bs-docs-separator">