Check that the output of the ‘oni-smartparens’ test ends in t

There can be other output, but that doesn’t mean the test failed, as long as t
is the last thing.

test/integration/oni-smartparens.bats

@@ -7,5 +7,5 @@
 
     echo "$output"
 
-    [ "$output" = "t" ]
+    [[ "$output" == *"t" ]]
 }