t1410: fix breakage on case-insensitive filesystems

Two tests recently added to t1410 create branches "a" and
"a/b" to test d/f conflicts on reflogs. Earlier, unrelated
tests in that script create the path "A/B" in the working
tree.  There's no conflict on a case-sensitive filesystem,
but on a case-insensitive one, "git log" will complain that
"a/b" is both a revision and a working tree path.

We could fix this by using a "--" to disambiguate, but we
are probably better off using names that are less confusing
to make it more clear that they are unrelated to the working
tree files.  This patch turns "a/b" into "one/two".

Reported-by: Michael Blume <blume.mike@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t1410-reflog.sh

@@ -246,36 +246,36 @@ test_expect_success 'gc.reflogexpire=false' '
 '
 
 test_expect_success 'stale dirs do not cause d/f conflicts (reflogs on)' '
-	test_when_finished "git branch -d a || git branch -d a/b" &&
+	test_when_finished "git branch -d one || git branch -d one/two" &&
 
-	git branch a/b master &&
-	echo "a/b@{0} branch: Created from master" >expect &&
-	git log -g --format="%gd %gs" a/b >actual &&
+	git branch one/two master &&
+	echo "one/two@{0} branch: Created from master" >expect &&
+	git log -g --format="%gd %gs" one/two >actual &&
 	test_cmp expect actual &&
-	git branch -d a/b &&
+	git branch -d one/two &&
 
-	# now logs/refs/heads/a is a stale directory, but
-	# we should move it out of the way to create "a" reflog
-	git branch a master &&
-	echo "a@{0} branch: Created from master" >expect &&
-	git log -g --format="%gd %gs" a >actual &&
+	# now logs/refs/heads/one is a stale directory, but
+	# we should move it out of the way to create "one" reflog
+	git branch one master &&
+	echo "one@{0} branch: Created from master" >expect &&
+	git log -g --format="%gd %gs" one >actual &&
 	test_cmp expect actual
 '
 
 test_expect_success 'stale dirs do not cause d/f conflicts (reflogs off)' '
-	test_when_finished "git branch -d a || git branch -d a/b" &&
+	test_when_finished "git branch -d one || git branch -d one/two" &&
 
-	git branch a/b master &&
-	echo "a/b@{0} branch: Created from master" >expect &&
-	git log -g --format="%gd %gs" a/b >actual &&
+	git branch one/two master &&
+	echo "one/two@{0} branch: Created from master" >expect &&
+	git log -g --format="%gd %gs" one/two >actual &&
 	test_cmp expect actual &&
-	git branch -d a/b &&
+	git branch -d one/two &&
 
-	# same as before, but we only create a reflog for "a" if
+	# same as before, but we only create a reflog for "one" if
 	# it already exists, which it does not
-	git -c core.logallrefupdates=false branch a master &&
+	git -c core.logallrefupdates=false branch one master &&
 	: >expect &&
-	git log -g --format="%gd %gs" a >actual &&
+	git log -g --format="%gd %gs" one >actual &&
 	test_cmp expect actual
 '