Comment fixes.

extraconf.h

@@ -5,9 +5,9 @@ Don't include it from any other files.
 The only code that belongs here is preprocessor directives that:
 
 1) change the configuration setting defined in config.h if they
-are inappropriate for the edition being compiled.
+there is a conflict between them.
 
-2) define symbols fully dependendent on those in config.h to eliminate
+2) define symbols that fully depend on those in config.h to eliminate
 the need to embed this logic into configure.in.
 */