[meld] filediff: Migrate save handling to new error dialog helper

[Kai Willadsen <kaiw src gnome org>]

commit 3add7ef47c2456c912ee380be4edb711cc0a586b
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Dec 14 06:52:54 2014 +1000

    filediff: Migrate save handling to new error dialog helper

 meld/filediff.py |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/meld/filediff.py b/meld/filediff.py
index 614b66c..c7a5086 100644
--- a/meld/filediff.py
+++ b/meld/filediff.py
@@ -1601,10 +1601,12 @@ class FileDiff(melddoc.MeldDoc, gnomeglade.Component):
     def _save_text_to_filename(self, filename, text):
         try:
             open(filename, "wb").write(text)
-        except IOError as e:
-            misc.run_dialog(
-                _("Error writing to %s\n\n%s.") % (filename, e),
-                self, Gtk.MessageType.ERROR, Gtk.ButtonsType.OK)
+        except IOError as err:
+            misc.error_dialog(
+                primary=_("Could not save file %s.") % filename,
+                secondary=_("Couldn't save file due to:\n%s") % (
+                    GLib.markup_escape_text(str(err))),
+            )
             return False
         return True