[gspell] Clarify AUTHORS

[Sébastien Wilmet <swilmet src gnome org>]

commit c51f7b1cae912ffc418a2eba7389b16e58a3fe43
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Wed Mar 9 14:41:29 2016 +0100

    Clarify AUTHORS

 AUTHORS |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/AUTHORS b/AUTHORS
index d8d4d6b..77128b7 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -8,5 +8,6 @@ Jesse van den Kieboom
 Ignacio Casal Quinteiro
 Sébastien Wilmet
 
-The GspellInlineCheckerText originally comes from GtkSpell, which was written by:
+The inline checker for GtkTextView originally comes from an old version of
+GtkSpell, which was written by:
 Evan Martin