'forall' always a keyword, plus the dot type operator

compiler/parser/Lexer.x

compiler/parser/Parser.y

compiler/parser/RdrHsSyn.hs

compiler/prelude/PrelNames.hs

compiler/rename/RnTypes.hs

compiler/rename/RnUnbound.hs

docs/users_guide/8.8.1-notes.rst

testsuite/tests/ghci/prog006/prog006.stderr

...ite/tests/parser/should_fail/ParserNoForallUnicode.stderr

testsuite/tests/parser/should_fail/T12811.stderr

testsuite/tests/parser/should_fail/T3095.stderr

testsuite/tests/rename/should_fail/rnfail052.stderr

testsuite/tests/rename/should_fail/rnfail053.stderr

testsuite/tests/typecheck/should_fail/T3155.stderr

testsuite/tests/typecheck/should_fail/tcfail166.stderr

testsuite/tests/typecheck/should_fail/tcfail183.stderr