tm.texi REG_CLASS_CONTENTS documentation clarification

[Jeffrey A Law]

  In message < m3lmyf1t73.fsf@troilus.org >you write:
  > When I first tried to port gcc to a new target processor with more
  > than 32 registers, I found myself getting bitten mysteriously because
  > I had the masks in REG_CLASS_CONTENTS for the processor in the wrong
  > order.  Might I suggest something like the below to clarify this case?
  > 
  > 2000-08-02  Michael Poole  <poole@troilus.org>
  > 
  >         * tm.texi (Register Classes): Clarify order of sub-initializers
  >         in REG_CLASS_CONTENTS.
Thanks.  Installed.
jeff