Add empty line at end of previous release notes

Author: heipei

Documentation/ReleaseNotes/v0.6.2.txt

@@ -15,4 +15,5 @@ In addition, the following features have been added:
 * There is now a 'New…' option to create a new repository
 * The 'Gist It' feature now asks for confirmation by default. This can be changed in the preferences
 * GitX can now open any directory by dragging it on the icon
-* GitX now asks for confirmation before deleting a branch
+* GitX now asks for confirmation before deleting a branch
+

Documentation/ReleaseNotes/v0.6.3.txt

@@ -5,4 +5,5 @@ This is a maintenance release. The following bugs have been fixed:
 
 * Fixed a problem where GitX could not open some directories, for example those that include a . [Johannes Gilger]
 * Fixed a performance issue when staging or unstaging a lot of files
-* Various buildfixes (Benjamin Kramer, Arjen Laarhoven)
+* Various buildfixes (Benjamin Kramer, Arjen Laarhoven)
+