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/ip/snoopy/dump.c

@@ -55,7 +55,7 @@ p_seprint(Msg *m)
 		for(i = 0; i < n && p+1<e; i++){
 			c = ps[i];
 			*p++ = tohex[c>>4];
-			*p++ = tohex[c&0xf]; 
+			*p++ = tohex[c&0xf];
 		}
 	}