t/import: quiet warning, clobber variable

The eval in key2sub via t/run.perl ("make check-run") won't
trigger the warning, but running "prove -bvw t/import.t"
directly, does.  In any case, ensure the contents of this
variable doesn't linger across runs.

1 files changed, 1 insertions, 0 deletions

diff --git a/t/import.t b/t/import.t
index 9491f337..440e8994 100644
--- a/t/import.t
+++ b/t/import.t
@@ -126,5 +126,6 @@ like($$bref, qr/^author Ba d \$main::badchars <spammer\@example\.com> /sm,
          'latest commit accepted by spammer');
 $git->qx(qw(fsck --no-progress --strict));
 is($?, 0, 'fsck reported no errors');
+$main::badchars = undef;
 
 done_testing();