[PATCH 1 of 2] test-check-interface: do not expect bare "python" executable exists

[Yuya Nishihara]

# HG changeset patch
# User Yuya Nishihara <yuya at tcha.org>
# Date 1608346918 -32400
#      Sat Dec 19 12:01:58 2020 +0900
# Node ID 5db45dfd6206490f8668559838c8888c4d4ca9ac
# Parent  09beb9a133f168111fbef4a729f1c0cc2bfb87ce
test-check-interface: do not expect bare "python" executable exists

The test would crash if python executable had version suffix.

diff --git a/tests/test-check-interfaces.py b/tests/test-check-interfaces.py
--- a/tests/test-check-interfaces.py
+++ b/tests/test-check-interfaces.py
@@ -12,7 +12,7 @@ import sys
 
 # Only run if tests are run in a repo
 if subprocess.call(
-    ['python', '%s/hghave' % os.environ['TESTDIR'], 'test-repo']
+    [sys.executable, '%s/hghave' % os.environ['TESTDIR'], 'test-repo']
 ):
     sys.exit(80)