btrfs: Fix typos in comments and strings

The typos accumulate over time so once in a while time they get fixed in
a large patch.

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 39d3b4b..127fa15 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -699,7 +699,7 @@ struct btrfs_trans_handle *btrfs_attach_transaction(struct btrfs_root *root)
 /*
  * btrfs_attach_transaction_barrier() - catch the running transaction
  *
- * It is similar to the above function, the differentia is this one
+ * It is similar to the above function, the difference is this one
  * will wait for all the inactive transactions until they fully
  * complete.
  */
@@ -1329,7 +1329,7 @@ static int qgroup_account_snapshot(struct btrfs_trans_handle *trans,
 		return 0;
 
 	/*
-	 * Ensure dirty @src will be commited.  Or, after comming
+	 * Ensure dirty @src will be committed.  Or, after coming
 	 * commit_fs_roots() and switch_commit_roots(), any dirty but not
 	 * recorded root will never be updated again, causing an outdated root
 	 * item.