+- run `make maintainer-push-check', which runs `make maintainer-check'
+ while activating the push implementation and its pull interface wrappers
+ in many test cases that were originally written to exercise only the
+ pull implementation. This makes certain the push implementation can
+ perform every task the pull implementation can.
+
+- run `make maintainer-xml-check', which runs `make maintainer-check'
+ while checking Bison's XML automaton report for every working grammar
+ passed to Bison in the test suite. The check just diffs the output of
+ Bison's included XSLT style sheets with the output of --report=all and
+ --graph.
+