Fix typo

docs/base-css.html

@@ -1084,7 +1084,7 @@ For example, <code>section</code> should be wrapped as inline.
           <p>Add text or buttons before or after any text-based input. Do note that <code>select</code> elements are not supported here.</p>
 
           <h4>Default options</h4>
-          <p>Wrap a <code>.add-on</code> and an <code>input</code> with one of two classes to prepend or append text to an input.</p>
+          <p>Wrap an <code>.add-on</code> and an <code>input</code> with one of two classes to prepend or append text to an input.</p>
           <form class="bs-docs-example">
             <div class="input-prepend">
               <span class="add-on">@</span>

docs/templates/pages/base-css.mustache

@@ -1021,7 +1021,7 @@
           <p>{{_i}}Add text or buttons before or after any text-based input. Do note that <code>select</code> elements are not supported here.{{/i}}</p>
 
           <h4>{{_i}}Default options{{/i}}</h4>
-          <p>{{_i}}Wrap a <code>.add-on</code> and an <code>input</code> with one of two classes to prepend or append text to an input.{{/i}}</p>
+          <p>{{_i}}Wrap an <code>.add-on</code> and an <code>input</code> with one of two classes to prepend or append text to an input.{{/i}}</p>
           <form class="bs-docs-example">
             <div class="input-prepend">
               <span class="add-on">@</span>