Pass shellcheck, more specs are handled, preserve function whitespace

This closes #49.

tests/source-bad-file

@@ -2,13 +2,9 @@
 cd "${0%/*}" || exit 1
 . ../run-tests
 
-arguments=(--source=invalid)
-returnCode=1
-template="Do not display this"
-expected() {
-    cat <<EOF
-No such file: invalid
-EOF
-}
+export arguments=(--source=invalid)
+export returnCode=1
+export template="Do not display this"
+export expected=$'No such file: invalid\n'
 
 runTest