Trivial changes: whitespace and modes.

Remote whitespace at the ends of lines.
Remove blank lines from the ends of files.
Change modes on source files so that they
are not executable.

Signed-off-by: Dan Cross <cross@gajendra.net>

src/cmd/rc/lex.c

@@ -50,7 +50,7 @@ advance(void)
 }
 /*
  * read a character from the input stream
- */	
+ */
 
 int
 getnext(void)