ruby/ruby — pull request #202 by dark-panda (2012-10-23 04:44:30+00:00)
Title: Fix detection of RL_PROMPT_*_IGNORE macros.

mkmf doesn't create HAVE_X definitions, so HAVE_RL_PROMPT_START_IGNORE
and HAVE_RL_PROMPT_END_IGNORE don't actually get defined by
ext/readline/extconf.rb. Instead, we should detect for
RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE directly.