fix ext3/ext4 comment typo compain -> complain

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 735c20d..adcb713 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -302,7 +302,7 @@
  * write out the superblock safely.
  *
  * We'll just use the jbd2_journal_abort() error code to record an error in
- * the journal instead.  On recovery, the journal will compain about
+ * the journal instead.  On recovery, the journal will complain about
  * that error until we've noted it down and cleared it.
  */