---
 pch.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: b/pch.c
===================================================================
--- a/pch.c
+++ b/pch.c
@@ -1877,7 +1877,9 @@ pch_line_len (LINENUM line)
     return p_len[line];
 }
 
-/* Return the control character (+, -, *, !, etc) for a patch line. */
+/* Return the control character (+, -, *, !, etc) for a patch line.  A '\n'
+   indicates an empty line in a hunk that isn't part of the old or new
+   file's contents -- the context format allows that. */
 
 char
 pch_char (LINENUM line)