g.gui.vdigit: fix keywords --> keyword

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@66896 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/vdigit/g.gui.vdigit.py

@@ -20,11 +20,12 @@
 
 #%module
 #% description: Interactive editing and digitization of vector maps.
-#% keywords: general
-#% keywords: GUI
-#% keywords: vector
-#% keywords: editing
-#% keywords: digitization
+#% keyword: general
+#% keyword: user interface
+#% keyword: GUI
+#% keyword: vector
+#% keyword: editing
+#% keyword: digitizer
 #%end
 #%flag
 #% key: c