- added new command :regsave, which persists the current settings   to the Registry (only for Win32 builds which uses that mound). - tackle the usability problem where a module search path that   doesn't contain the Prelude causes the interpreter to just   quit.
- added new command :regsave, which persists the current settings
  to the Registry (only for Win32 builds which uses that mound).
- tackle the usability problem where a module search path that
  doesn't contain the Prelude causes the interpreter to just
  quit.

  This is unfriendly to Win32 users which may have :set an erroneous
  search path (=> stored in the Registry) in a previous session,
  causing Hugs now to just mysteriously fail to start up (cf. misc
  bug reports / feedback on this over the past couple of years).

  So, for Win32 builds, we now fall back to attempt using the
  default HUGSPATH should the user-specified one not contain
  Prelude. The interpreter emits a message about this & suggests
  the user uses :regsave to persist this search path change.

Now, if only I could side-effect the documentation to reflect these
changes..

FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs