[gtk] CellEditable: Fix grammar error in doc synopsis

[Daniel Boles <dboles src gnome org>]

commit 44682256a9d3110e55a808ecee233fa9d1132ace
Author: Daniel Boles <dboles src gmail com>
Date:   Mon Apr 2 11:49:35 2018 +0100

    CellEditable: Fix grammar error in doc synopsis

 gtk/gtkcelleditable.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/gtk/gtkcelleditable.c b/gtk/gtkcelleditable.c
index 204b5717f7..4b2c01fdac 100644
--- a/gtk/gtkcelleditable.c
+++ b/gtk/gtkcelleditable.c
@@ -17,8 +17,7 @@
 
 /**
  * SECTION:gtkcelleditable
- * @Short_description: Interface for widgets which can are used for editing
- *  cells
+ * @Short_description: Interface for widgets that can be used for editing cells
  * @Title: GtkCellEditable
  * @See_also: #GtkEntry, #GtkCellRenderer
  *