t: fix trivial &&-chain breakage

These are tests which are missing a link in their &&-chain,
but during a setup phase. We may fail to notice failure in
commands that build the test environment, but these are
typically not expected to fail at all (but it's still good
to double-check that our test environment is what we
expect).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/t8003-blame-corner-cases.sh b/t/t8003-blame-corner-cases.sh
index 2a3469b..32895e5 100755
--- a/t/t8003-blame-corner-cases.sh
+++ b/t/t8003-blame-corner-cases.sh
@@ -26,7 +26,7 @@
 	cat one >uno &&
 	mv two dos &&
 	cat one >>tres &&
-	echo DEF >>mouse
+	echo DEF >>mouse &&
 	git add uno dos tres mouse &&
 	test_tick &&
 	GIT_AUTHOR_NAME=Second git commit -a -m Second &&
@@ -153,15 +153,15 @@
 '
 
 test_expect_success 'blame to a commit with no author name' '
-  TREE=`git rev-parse HEAD:`
-  cat >badcommit <<EOF
+  TREE=`git rev-parse HEAD:` &&
+  cat >badcommit <<EOF &&
 tree $TREE
 author <noname> 1234567890 +0000
 committer David Reiss <dreiss@facebook.com> 1234567890 +0000
 
 some message
 EOF
-  COMMIT=`git hash-object -t commit -w badcommit`
+  COMMIT=`git hash-object -t commit -w badcommit` &&
   git --no-pager blame $COMMIT -- uno >/dev/null
 '