tests: don't drop global hgrc
Various tests are failing when the simple store extension is loaded
because the test overrides HGRCPATH and preempts loading of extensions
that were injected via --extra-config-opt.
In most cases, it is acceptable to always load the global HGRCPATH.
So this commit changes a couple of tests so the global HGRCPATH
is still pulled in.
Differential Revision: https://phab.mercurial-scm.org/D3098
$ hg init
$ $PYTHON -c 'open("a", "wb").write(b"confuse str.splitlines\nembedded\rnewline\n")'
$ hg ci -Ama -d '1 0'
adding a
$ echo clean diff >> a
$ hg ci -mb -d '2 0'
$ hg diff -r0 -r1
diff -r 107ba6f817b5 -r 310ce7989cdc a
--- a/a Thu Jan 01 00:00:01 1970 +0000
+++ b/a Thu Jan 01 00:00:02 1970 +0000
@@ -1,2 +1,3 @@
confuse str.splitlines
embedded\r (no-eol) (esc)
newline
+clean diff