tests: fix typo in tac-continue

* tests/misc/tac-continue: Fix typo in usually-skipped test:
s/mkfifo_or_skip/mkfifo_or_skip_/ (i.e., append "_").
This test is usually skipped, because I'm probably the only
one to set the FULL_PARTITION_TMPDIR envvar, and recently the
one I'd been using ceased to exist, so this test was skipped
even for me.  Good argument for making this a root-only test
and creating a full partition just for this test case.

diff --git a/tests/misc/tac-continue b/tests/misc/tac-continue
index 5902805..2f6e813 100755 (executable)
--- a/tests/misc/tac-continue
+++ b/tests/misc/tac-continue
@@ -53,7 +53,7 @@ seq 5 > in
 
 # Give tac a fifo command line argument.
 # This makes it try to create a temporary file in $TMPDIR.
-mkfifo_or_skip fifo
+mkfifo_or_skip_ fifo
 seq 1000 > fifo &
 TMPDIR=$FULL_PARTITION_TMPDIR tac fifo in >out 2>err && fail=1