* lib/m4sugar/m4sugar.m4 (m4_re_string, m4_re_word): Revert 2002-03-04.
* tests/local.at (AT_CHECK_M4SUGAR): Add `m4sugar' to keywords.
(AT_CHECK_ENV): Ignore LTLIBOBJS, FC variables, EGREP, FGREP, and SED.
* tests/m4sugar.at (AT_CHECK_M4SUGAR_TEXT, AT_CHECK_M4RE): New macros.
(Standard regular expressions): New test.
(m4_warn, m4_require: circular dependencies, m4_text_wrap): Strip
excess test name quoting.
* tests/semantics.at (AC_CHECK_HEADERS_OLD, AC_CHECK_HEADERS_NEW): Pass
CPPFLAGS to `configure' instead of setting it in `configure'.