Fix calls to close_read mistakenly copied as close_write.
Fix calls to close_read mistakenly copied as close_write.

eregon/rubyspec,wied03/rubyspec,nobu/rubyspec,wied03/rubyspec,sgarciac/spec,ruby/spec,sgarciac/spec,nobu/rubyspec,kachick/rubyspec,eregon/rubyspec,kachick/rubyspec,ruby/rubyspec,ruby/spec,sgarciac/spec,wied03/rubyspec,ruby/spec,eregon/rubyspec,kachick/rubyspec,ruby/rubyspec,nobu/rubyspec