* automake.in ($IGNORE_PATTERN): Improve for multi-line matches. ($RULE_PATTERN): Use that from `&make_paragraphs'. ($MACRO_PATTERN): Just catch the name of a macro. ($BOGUS_MACRO_PATTERN): Remove. ($ASSIGNMENT_PATTERN): New. (&file_contents_internal, &make_paragraphs): Adjust. (¯o_define): Catch bad macro names. (&cond_stack_endif): Better error message. (&file_contents_internal): Don't remove backslashes in variable values. (¯o_define): Do it for `+=' user variables. (&define_standard_variables): Use `undef' instead of a dummy variable. (&make_paragraph): Be sure not to chop the trail of hash only lines: adjust the `##' regexp. (&rule_define): Fix a bug: don't read $1 but $target. * tests/condincl.test: Strengthen.