Replaced occurance of 'a text' with the more generic 'content.'

index.html

@@ -44,7 +44,7 @@ <h3>Distinctive features of collaboration tools</h3>
           <dt>Annotation of content with comments</dt>
           <dd>Some tools enable users to associate comments with parts of the content that is being read or edited. In systems such as word processors, replying to comments is supported, allowing threads of discussion to be associated with parts of a document.</dd>
           <dt>Comparing revisions</dt>
-          <dd>Some systems can display the differences between revisions of a text for purposes of comparison.</dd>
+          <dd>Some systems can display the differences between revisions of content for purposes of comparison.</dd>
           <dt>Suggested changes</dt>
           <dd>Some word processors can show changes (insertions, deletions and formatting-related modifications) made by collaborators, which an author can choose to accept or reject. These revisions are sometimes referred to as <dfn>suggested changes</dfn> or as <dfn>tracked changes</dfn>. Each change may be accompanied by metadata, for example the identity of the author who made the change, and a time stamp.</dd>
           <dt>Access controls</dt>