Update comments.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/intervals.c b/src/intervals.c
index e69ff70138..20c4c191a9 100644
--- a/src/intervals.c
+++ b/src/intervals.c
@@ -2016,6 +2016,10 @@ set_point_both (buffer, charpos, bytepos)
   register INTERVAL to, from, toprev, fromprev;
   int buffer_point;
   int old_position = BUF_PT (buffer);
+  /* This ensures that we move forward past intangible text when the
+     initial position is the same as the destination, in the rare
+     instances where this is important, e.g. in line-move-finish
+     (simple.el).  */
   int backwards = (charpos < old_position ? 1 : 0);
   int have_overlays;
   int original_position;