Remove trailing spaces [ci skip]

1 files changed, 1 insertions, 1 deletions

diff --git a/io.c b/io.c
index 75db7abfe5..2760e6c530 100644
--- a/io.c
+++ b/io.c
@@ -1293,7 +1293,7 @@ rb_io_wait_writable(int f)
         VALUE result = rb_funcall(scheduler, rb_intern("wait_writable_fd"), 1, INT2NUM(f));
         return RTEST(result);
     }
-    
+
     io_fd_check_closed(f);
     switch (errno) {
       case EINTR: