Fix for grep and egrep syntax types, plus tests.

[SVN r36470]

doc/syntax_leftmost_longest.html

@@ -24,7 +24,7 @@
       </P>
       <HR>
       <p></p>
-      <P>Often there is more that one way of matching a regular expression at a 
+      <P>Often there is more than one way of matching a regular expression at a 
          particular location, for POSIX basic and extended regular expressions, the 
          "best" match is determined as follows:</P>
       <OL>