Clarify example snippets a bit.

Jim Grosbach · Jim Grosbach · commit 07ae229048f2 · 2011-10-28T20:52:20.000Z
llvm-svn: 143224
diff --git a/llvm/docs/ProgrammersManual.html b/llvm/docs/ProgrammersManual.html
@@ -998,7 +998,7 @@ <h4>
 <pre>
 for ( ... ) {
    std::vector&lt;foo&gt; V;
-   use V;
+   // make use of V.
 }
 </pre>
 </div>
@@ -1009,7 +1009,7 @@ <h4>
 <pre>
 std::vector&lt;foo&gt; V;
 for ( ... ) {
-   use V;
+   // make use of V.
    V.clear();
 }
 </pre>
