emerge: Prepend '=' to unmerge atoms (bug 512578)

Signed-off-by: Alexander Berntsen <bernalex@gentoo.org>
Reviewed-By:   Brian Dolbec       <dolsen@gentoo.org>
Reviewed-By:   Michał Górny       <mgorny@gentoo.org>
diff --git a/pym/_emerge/unmerge.py b/pym/_emerge/unmerge.py
index 8f98563..30b1930 100644
--- a/pym/_emerge/unmerge.py
+++ b/pym/_emerge/unmerge.py
@@ -488,7 +488,8 @@
 		if quiet:
 			writemsg_level("\n", noiselevel=-1)
 
-	writemsg_level("\nAll selected packages: %s\n" % " ".join(all_selected), noiselevel=-1)
+	writemsg_level("\nAll selected packages: %s\n" %
+				" ".join('=%s' % x for x in all_selected), noiselevel=-1)
 
 	writemsg_level("\n>>> " + colorize("UNMERGE_WARN", "'Selected'") + \
 		" packages are slated for removal.\n")