Make text more clear

Author: guraga

doc/manual.html

@@ -1277,12 +1277,12 @@ <h3 id="api_content">Content manipulation methods</h3>
       <dt id="lineCount"><code><strong>doc.lineCount</strong>() → integer</code></dt>
       <dd>Get the number of lines in the editor.</dd>
       <dt id="firstLine"><code><strong>doc.firstLine</strong>() → integer</code></dt>
-      <dd>Get the first line of the editor. This will
+      <dd>Get the number of first line in the editor. This will
       usually be zero but for <a href="#linkedDoc_from">linked sub-views</a>,
       or <a href="#api_doc">documents</a> instantiated with a non-zero
       first line, it might return other values.</dd>
       <dt id="lastLine"><code><strong>doc.lastLine</strong>() → integer</code></dt>
-      <dd>Get the last line of the editor. This will
+      <dd>Get the number of last line in the editor. This will
       usually be <code>doc.lineCount() - 1</code>,
       but for <a href="#linkedDoc_from">linked sub-views</a>,
       it might return other values.</dd>