t9390: close link of broken &&-chain

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

t/t9390-filter-repo.sh

@@ -942,7 +942,7 @@ test_expect_success '--strip-blobs-with-ids' '
 		! grep words/to ../filenames &&
 		! grep capricious ../filenames &&
 		! grep fickle ../filenames &&
-		! grep mercurial ../filenames
+		! grep mercurial ../filenames &&
 
 		# Remove the temporary auxiliary files
 		rm ../bad-ids &&