[diffoscope] 02/05: Print "no package mapping" in --list-tools to stderr, not stdout.

[Chris Lamb]

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lamby pushed a commit to branch master
in repository diffoscope.

commit 4de69d8294ebede5991712a001b12f6855ca45f2
Author: Chris Lamb <lamby at debian.org>
Date:   Sat Aug 13 19:59:20 2016 +0100

    Print "no package mapping" in --list-tools to stderr, not stdout.
---
 diffoscope/main.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/diffoscope/main.py b/diffoscope/main.py
index 4eb06b9..073aacb 100644
--- a/diffoscope/main.py
+++ b/diffoscope/main.py
@@ -139,7 +139,7 @@ class ListToolsAction(argparse.Action):
                 os_list = [os_override]
             else:
                 print()
-                print("No package mapping found for: {} (possible values: {})".format(os_override, ", ".join(sorted(OS_NAMES.keys()))))
+                print("No package mapping found for: {} (possible values: {})".format(os_override, ", ".join(sorted(OS_NAMES.keys()))), file=sys.stderr)
                 sys.exit(1)
         else:
             current_os = get_current_os()

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