Merge branch 'maint'
* maint:
tests: fix spurious failures with "chatty" make implementations
tests: fix spurious failure on fast machines
tests: avoid spurious failure of 'uninstall-fail.test' on Solaris
tests: avoid spurious failure in 'parallel-tests3.test'
tests: fix spurious failure with FreeBSD make and Yacc in VPATH
---
Merge branch 'master' into testsuite-work
* master:
tests: fix spurious failures with "chatty" make implementations
tests: fix aclocal-print-acdir.test
tests: fix spurious failure on fast machines
tests: avoid spurious failure of 'uninstall-fail.test' on Solaris
tests: avoid spurious failure of 'uninstall-fail.test' on Cygwin
tests: avoid spurious failure in 'parallel-tests3.test'
tests: fix spurious failure with FreeBSD make and Yacc in VPATH
tests: fix spurious failure with autoconf 2.62
refactor: improve signature of 'check_directory' sub in automake
docs: avoid using colon character inside arguments of @pxref
