Small updates to manual

doc/manual.html

@@ -32,8 +32,8 @@ <h2 id="overview">Overview</h2>
 
     <p>CodeMirror works with language-specific modes. Modes are
     JavaScript programs that help color (and optionally indent) text
-    written in a given language. The distribution comes with a few
-    modes (see the <code>mode/</code> directory), and it isn't hard
+    written in a given language. The distribution comes with a number
+    of modes (see the <code>mode/</code> directory), and it isn't hard
     to <a href="#modeapi">write new ones</a> for other languages.</p>
 
     <h2 id="usage">Basic Usage</h2>
@@ -912,8 +912,7 @@ <h2 id="modeapi">Writing CodeMirror Modes</h2>
     style string, or <code>null</code> for tokens that do not have to
     be styled. For your styles, you can either use the 'standard' ones
     defined in the themes (without the <code>cm-</code> prefix), or
-    define your own (as the <a href="../mode/diff/index.html">diff</a>
-    mode does) and have people include a custom CSS file for your
+    define your own and have people include a custom CSS file for your
     mode.<p>
 
     <p id="StringStream">The stream object encapsulates a line of code