Cosmetic fixes for mirror script stderr.

* jeepyb/cmd/run_mirror.py: Add newlines to a couple write calls
which were lacking, and also in places where an extra blank line
could provide useful visual separation.

Change-Id: I54e38512717864f02bdc21a577498c0422bf5251
Reviewed-on: https://review.openstack.org/24015
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Approved: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Tested-by: Jenkins
diff --git a/jeepyb/cmd/run_mirror.py b/jeepyb/cmd/run_mirror.py
index 8a54f64..6ae2d65 100644
--- a/jeepyb/cmd/run_mirror.py
+++ b/jeepyb/cmd/run_mirror.py
@@ -135,8 +135,8 @@
                     print(out)
                 if "\nSuccessfully installed " not in out:
                     sys.stderr.write("Installing pip requires for %s:%s "
-                                     "failed." % (project, branch))
-                    sys.stderr.write(out)
+                                     "failed.\n%s\n" %
+                                     (project, branch, out))
                     print("pip install did not indicate success")
                 else:
                     freeze = run_command("%s freeze -l" % pip)
@@ -155,8 +155,8 @@
                         print(out)
                     if "\nSuccessfully downloaded " not in out:
                         sys.stderr.write("Downloading pip requires for %s:%s "
-                                         "failed." % (project, branch))
-                        sys.stderr.write(out)
+                                         "failed.\n%s\n" %
+                                         (project, branch, out))
                         print("pip install did not indicate success")
                     print("cached:\n%s" % freeze)
             else: