Update whitespace; make the output easier to read

FAILED/SUCCESS lines would be separated by a whitespace from the list
of architectures, but not itself followed by whitespace. This is slightly
confusing, as one could interpret it as being a heading for the following
block of tested packages, rather that the final result of the previous
block.

britney.py

@@ -2370,7 +2370,7 @@ class Britney(object):
 
             if not force:
                 self.output_write(eval_uninst(self.options.architectures,
-                                              newly_uninst(nuninst_start, nuninst_end)) + "\n")
+                                              newly_uninst(nuninst_start, nuninst_end)))
 
         if force or self.is_nuninst_asgood_generous(self.nuninst_orig, nuninst_end):
             # Result accepted either by force or by being better than the original result.
@@ -2386,7 +2386,7 @@ class Britney(object):
             if force:
                 self.output_write("force breaks:\n")
                 self.output_write(eval_uninst(self.options.architectures,
-                                              newly_uninst(nuninst_start, nuninst_end)) + "\n")
+                                              newly_uninst(nuninst_start, nuninst_end)))
             self.output_write("SUCCESS (%d/%d)\n" % (len(actions or self.upgrade_me), len(extra)))
             self.nuninst_orig = nuninst_end
             self.all_selected += [x.uvname for x in selected]
@@ -2402,6 +2402,7 @@ class Britney(object):
             lundo.reverse()
 
             undo_changes(lundo, self.systems, self.sources, self.binaries)
+        self.output_write("\n")