RUBY_PATCHLEVEL    32 version.c      const int ruby_patchlevel = RUBY_PATCHLEVEL;
RUBY_PATCHLEVEL    37 version.h      #if RUBY_PATCHLEVEL == -1
RUBY_PATCHLEVEL    40 version.h      #define RUBY_PATCHLEVEL_STR "p"STRINGIZE(RUBY_PATCHLEVEL)
RUBY_PATCHLEVEL    51 version.h      # if RUBY_PATCHLEVEL == -1