warning.   [ruby-core:20612]

* lib/irb/completion.rb, lib/net/imap.rb, lib/prime.rb,
  lib/rinda/ring.rb, lib/racc/parser.rb,
  lib/shell/command-processor.rb, lib/yaml/yamlnode.rb: ditto.

* lib/racc/parser.rb: remove space before parentheses.

* lib/shell/command-processor.rb, lib/shell/process-controller.rb:
  use parentheses around arguments.

* lib/irb/ext/change-ws.rb, lib/rexml/validation/relaxng.rb,
  lib/yaml/baseemitter.rb: indentation fix.

* lib/matrix.rb: small cosmetic change.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20859 b2dd03c8-39d4-4d8f-98ff-823fe69b080e