Merge branch 'micro' into maint

* micro:
  t/README: document "run_make", discourage "make -e"
  cosmetics: tiny whitespace fixlets
  tests: avoid a spurious failure with MSVC
  tests: avoid a spurious failure on non-POSIX systems

diff --cc maintainer/maint.mk
Simple merge

diff --cc t/ax/am-test-lib.sh
Simple merge