improve comment wording

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@43370 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/g.extension/g.extension.py

@@ -103,7 +103,7 @@ def check():
     # check if we have the svn client
     if not grass.find_program('svn'):
         grass.fatal(_('svn client required. Please install subversion first.'))
-    # probably test here if we have "make" and "install" programs here too. gcc?
+    # probably test here if we have "make" and "install" programs as well. how about gcc?
 
 def expand_module_class_name(c):
     name = { 'd'  : 'display',