[pitivi] Fix a typo

[Piotr Drąg <piotrdrag src gnome org>]

commit f94e02f66ea3932cdf54d0e7718600ca361e69a6
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Jun 14 20:11:29 2015 +0200

    Fix a typo

 pitivi/project.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/pitivi/project.py b/pitivi/project.py
index fb6c8b3..9425797 100644
--- a/pitivi/project.py
+++ b/pitivi/project.py
@@ -238,7 +238,7 @@ class ProjectManager(GObject.Object, Loggable):
                             transient_for=self.app.gui)
 
         message = _("Pitivi detected a serious backend problem and could not "
-                    "recover from it, even after multiple tries. The only thing"
+                    "recover from it, even after multiple tries. The only thing "
                     "that can be done at this point is to <b>restart Pitivi</b>."
                     "\n\n"
                     "This is a rare and severe kind of bug. Please see our "