[Ruby 1.8 - Bug #269] OptionParser#environment requires shellwords

[Shyouhei_U]

e$B%A%1%C%He(B #269 e$B$,99?7$5$l$^$7$?!#e(B (by Shyouhei U.)

e$BC4Ev<Te(B Nobuyoshi N.e$B$K%;%C%He(B

Assigning to nobu; optparse.

http://redmine.ruby-lang.org/issues/show/269