[gegl] Fix another user-visible typo

[Alexandre Prokoudine <aprokoudine src gnome org>]

commit 4b603107a4ebe8aa9569363a3f10a48a64ecd11a
Author: Alexandre Prokoudine <alexandre prokoudine gmail com>
Date:   Wed Aug 7 17:25:12 2019 +0300

    Fix another user-visible typo

 operations/common/color-assimilation-grid.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/operations/common/color-assimilation-grid.c b/operations/common/color-assimilation-grid.c
index 933bf112f..b0db8201a 100644
--- a/operations/common/color-assimilation-grid.c
+++ b/operations/common/color-assimilation-grid.c
@@ -161,7 +161,7 @@ gegl_op_class_init (GeglOpClass *klass)
 
   gegl_operation_class_set_keys (operation_class,
     "name",        "gegl:color-assimilation-grid",
-    "title",       _("Color Assimilation Grid)"),
+    "title",       _("Color Assimilation Grid"),
     "categories",  "illusions",
     "description", _("Turn image grayscale and overlay an oversaturated grid - through color assimilation 
happening in the human visual system, for some grid scales this produces the illusion that the grayscale grid 
cells themselves also have color."),
     NULL);