[gnome-builder] Fix spelling

[Alexandre Franke <afranke src gnome org>]

commit 7ea5b59f18409aef756706bfb6aff8edc6a068f4
Author: Alexandre Franke <alexandre franke gmail com>
Date:   Fri Mar 18 12:12:00 2016 +0100

    Fix spelling

 plugins/git/ide-git-genesis-addin.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/git/ide-git-genesis-addin.c b/plugins/git/ide-git-genesis-addin.c
index 54be903..4ed9534 100644
--- a/plugins/git/ide-git-genesis-addin.c
+++ b/plugins/git/ide-git-genesis-addin.c
@@ -90,7 +90,7 @@ ide_git_genesis_addin_get_icon_name (IdeGenesisAddin *addin)
 static gchar *
 ide_git_genesis_addin_get_title (IdeGenesisAddin *addin)
 {
-  return g_strdup (_("From a existing project in a Git repository"));
+  return g_strdup (_("From an existing project in a Git repository"));
 }
 
 static void