[gnumeric] add some more translator explanation

[Andreas J. Guelzow <guelzow src gnome org>]

commit 3f4bc700129e3333fab2de4360a6ccc77195b9b6
Author: Andreas J Guelzow <aguelzow pyrshep ca>
Date:   Wed Oct 5 16:15:30 2011 -0600

    add some more translator explanation

 src/undo.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/undo.c b/src/undo.c
index 62614c1..56383ee 100644
--- a/src/undo.c
+++ b/src/undo.c
@@ -238,6 +238,9 @@ gnm_undo_filter_set_condition_undo (GOUndo *u, gpointer data)
 		/* xgettext: The first %d gives the number of rows that match. */
 		/* The second %d gives the total number of rows. Assume that the */
 		/* total number of rows is always large (>10). */
+		/* Note that the english "matches" or "match" is the verb of this sentence! */
+		/* There is no explicit noun associated with the second %d in english, the */
+		/* meaning is really "%d rows of all %d rows match" */
 		/* This is input to ngettext. */
 		format = ngettext ("%d row of %d matches",
 				   "%d rows of %d match",