btrfs: fix string and comment grammatical issues and typos

Signed-off-by: Nicholas D Steeves <nsteeves@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 8d358c5..e9710f4 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -1831,7 +1831,7 @@
 
 	/*
 	 * If we have a parent root we need to verify that the parent dir was
-	 * not delted and then re-created, if it was then we have no overwrite
+	 * not deleted and then re-created, if it was then we have no overwrite
 	 * and we can just unlink this entry.
 	 */
 	if (sctx->parent_root) {
@@ -4192,9 +4192,9 @@
 		return -ENOMEM;
 
 	/*
-	 * This hack is needed because empty acl's are stored as zero byte
+	 * This hack is needed because empty acls are stored as zero byte
 	 * data in xattrs. Problem with that is, that receiving these zero byte
-	 * acl's will fail later. To fix this, we send a dummy acl list that
+	 * acls will fail later. To fix this, we send a dummy acl list that
 	 * only contains the version number and no entries.
 	 */
 	if (!strncmp(name, XATTR_NAME_POSIX_ACL_ACCESS, name_len) ||