tests: consistently use pyflakes as a Python module
We check availability of pyflakes as a module, and also running it for real as
a module. Only fair to test filterpyflakes.py working correctly when using
pyflakes as a module too.
Differential Revision: https://phab.mercurial-scm.org/D8617
--- a/tests/test-check-pyflakes.t Wed Feb 26 00:31:23 2020 +0100
+++ b/tests/test-check-pyflakes.t Sat Jun 06 19:12:49 2020 +0800
@@ -8,7 +8,7 @@
$ cat > test.py <<EOF
> print(undefinedname)
> EOF
- $ pyflakes test.py 2>/dev/null | "$TESTDIR/filterpyflakes.py"
+ $ $PYTHON -m pyflakes test.py 2>/dev/null | "$TESTDIR/filterpyflakes.py"
test.py:1: undefined name 'undefinedname'
$ cd "`dirname "$TESTDIR"`"