[gxml] Fix a grammar error (can not)

[Piotr Drąg <piotrdrag src gnome org>]

commit 47b1d7f87647eafe4084fa795a6f787992ecdc3c
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Tue Mar 29 02:56:13 2016 +0200

    Fix a grammar error (can not)

 gxml/Enumeration.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gxml/Enumeration.vala b/gxml/Enumeration.vala
index 6c68d2b..441d87d 100644
--- a/gxml/Enumeration.vala
+++ b/gxml/Enumeration.vala
@@ -126,7 +126,7 @@ namespace GXml {
                                        enumv = ev;
                        }
                        if (enumv == null)
-                               throw new EnumerationError.INVALID_TEXT (_("text can not be parsed to 
enumeration type:")+enumeration.name ());
+                               throw new EnumerationError.INVALID_TEXT (_("text cannot be parsed to 
enumeration type:")+enumeration.name ());
                        return enumv;
                }
                /**