config: strip '.py' suffix from commands

This makes sure we parse config sections correctly even when running out
of the source tree like:

    PYTHONPATH=. python3 "gbp/scripts/dch.py"

1 files changed, 1 insertions, 1 deletions

diff --git a/gbp/config.py b/gbp/config.py
index d63754ea..08293d34 100644
--- a/gbp/config.py
+++ b/gbp/config.py
@@ -559,7 +559,7 @@ class GbpOptionParser(OptionParser):
             to parse
         @type sections: C{list} of C{str}
         """
-        self.command = command
+        self.command = command[:-3] if command.endswith('.py') else command
         self.sections = sections
         self.prefix = prefix
         self.config = {}