tests: replace some `python` by `"$PYTHON"` to not only use Python 2
I deleted my `python` binary as a test and a few tests started
failing.
Differential Revision: https://phab.mercurial-scm.org/D10250
--- a/tests/test-convert-cvs.t Sat Mar 13 03:17:00 2021 +0100
+++ b/tests/test-convert-cvs.t Mon Mar 22 13:14:11 2021 -0700
@@ -521,7 +521,7 @@
|cp932 |\x82\xa0 | x x o |
$ mkdir -p cvsrepo/transcoding
- $ python <<EOF
+ $ "$PYTHON" <<EOF
> fp = open('cvsrepo/transcoding/file,v', 'wb')
> fp.write((b'''
> head 1.4;
--- a/tests/test-merge-tools.t Sat Mar 13 03:17:00 2021 +0100
+++ b/tests/test-merge-tools.t Mon Mar 22 13:14:11 2021 -0700
@@ -1921,7 +1921,7 @@
Binary files capability checking
$ hg update -q -C 0
- $ python <<EOF
+ $ "$PYTHON" <<EOF
> with open('b', 'wb') as fp:
> fp.write(b'\x00\x01\x02\x03')
> EOF
@@ -1929,7 +1929,7 @@
$ hg commit -qm "add binary file (#1)"
$ hg update -q -C 0
- $ python <<EOF
+ $ "$PYTHON" <<EOF
> with open('b', 'wb') as fp:
> fp.write(b'\x03\x02\x01\x00')
> EOF