patch 8.2.1547: various comment problems

Problem:    Various comment problems.
Solution:   Update comments.
diff --git a/src/undo.c b/src/undo.c
index 7c1e597..12f3e96 100644
--- a/src/undo.c
+++ b/src/undo.c
@@ -3520,7 +3520,8 @@
 	do_outofmem_msg((long_u)0);
 	return;
     }
-    ml_replace_len(curbuf->b_u_line_lnum, curbuf->b_u_line_ptr.ul_line, curbuf->b_u_line_ptr.ul_len, TRUE, FALSE);
+    ml_replace_len(curbuf->b_u_line_lnum, curbuf->b_u_line_ptr.ul_line,
+				     curbuf->b_u_line_ptr.ul_len, TRUE, FALSE);
     changed_bytes(curbuf->b_u_line_lnum, 0);
     curbuf->b_u_line_ptr = oldp;