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/9660srv/iobuf.c

@@ -14,7 +14,7 @@
  * tarring up a Plan 9 distribution CD, we now use 16 128kb
  * buffers.  This works for ISO9660 because data is required
  * to be laid out contiguously; effectively we're doing agressive
- * readahead.  Because the buffers are so big and the typical 
+ * readahead.  Because the buffers are so big and the typical
  * disk accesses so concentrated, it's okay that we have so few
  * of them.
  *

src/cmd/9660srv/main.c

@@ -138,13 +138,13 @@ main(int argc, char **argv)
 		open("/dev/null", OWRITE);
 		if(pipe(pipefd) < 0)
 			panic(1, "pipe");
-		
+
 		if(post9pservice(pipefd[0], srvname, mtpt) < 0)
 			sysfatal("post9pservice: %r");
 		close(pipefd[0]);
 	}
 	srvfd = pipefd[1];
-	
+
 	switch(rfork(RFNOWAIT|RFNOTEG|RFFDG|RFPROC)){
 	case -1:
 		panic(1, "fork");

src/cmd/9660srv/xfile.c

@@ -167,4 +167,3 @@ clean(Xfile *f)
 	f->qid = (Qid){0,0,0};
 	return f;
 }
-