* parse.y (cond0): no special treatment of string literal in
  condition.

* math.c: add acos, asin, atan, conh, sinh, tanh and hypot to Math.

* configure.in: check hypot availablility.

* missing/hypot.c: public domain rewrite of hypot.

* parse.y (warn_unless_e_option): warning condition was wrong.

* parse.y (warning_unless_e_option): ditto.

* enum.c (enum_all): new method 'all?', which returns true if
  block returns true for all elements.

* enum.c (enum_any): new method 'any?', which returns true if
  block retruns true for any of elements.

* marshal.c (marshal_load): do not give warning unless explicitly
  set to verbose.

* eval.c (rb_exit): give string value "exit" to SystemExit.

* ruby.c (proc_options): -v should not print version if
  proc_options called via moreswitches().

* parse.y (stmt): while/until modifier must work for empty body.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@1241 b2dd03c8-39d4-4d8f-98ff-823fe69b080e