Fix nxstyle warning

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

fs/mmap/fs_rammap.c

@@ -103,8 +103,8 @@ void rammap_initialize(void)
  *   offset  The offset into the file to map
  *
  * Returned Value:
- *   On success, rammmap() returns a pointer to the mapped area. On error, the
- *   value MAP_FAILED is returned, and errno is set  appropriately.
+ *   On success, rammmap() returns a pointer to the mapped area. On error,
+ *   the value MAP_FAILED is returned, and errno is set  appropriately.
  *
  *     EBADF
  *      'fd' is not a valid file descriptor.

fs/vfs/fs_select.c

@@ -168,7 +168,9 @@ int select(int nfds, FAR fd_set *readfds, FAR fd_set *writefds,
           incr                 = 1;
         }
 
-      /* The exceptfds set holds the set of FDs that are watched for exceptions */
+      /* The exceptfds set holds the set of FDs that are watched for
+       * exceptions
+       */
 
       if (exceptfds && FD_ISSET(fd, exceptfds))
         {