[ruby-cvs:78936] b739a63eb4 (master): split internal.h into files

卜部昌平	2019-11-29 15:18:34 +0900 (Fri, 29 Nov 2019)

  New Revision: b739a63eb4

  https://github.com/ruby/ruby/commit/b739a63eb4

  Log:
    split internal.h into files
    
    One day, I could not resist the way it was written.  I finally started
    to make the code clean.  This changeset is the beginning of a series of
    housekeeping commits.  It is a simple refactoring; split internal.h into
    files, so that we can divide and concur in the upcoming commits.  No
    lines of codes are either added or removed, except the obvious file
    headers/footers.  The generated binary is identical to the one before