Merged r6282 from trunk.
scm: bazaar: use "shell_quote_command" method at adapter for JRuby + Windows command name.
Merged r6281 from trunk.
scm: git: use self.class.sq_bin for command name at adpter scm_cmd().
Merged r6280 from trunk.
scm: git: use "shell_quote_command" method at adapter for JRuby + Windows command name.
Merged r6279 from trunk.
scm: mercurial: use self.class.sq_bin for command name at adpter scm_cmd().
Merged r6278 from trunk.
scm: mercurial: use "shell_quote_command" method at adapter for JRuby + Windows command name.
Merged r6277 from trunk.
scm: cvs: use self.class.sq_bin for command name at adpter scm_cmd().
Merged r6276 from trunk.
scm: cvs: use "shell_quote_command" method at adapter for JRuby + Windows command name.
Merged r6275 from trunk.
scm: darcs: use "shell_quote_command" method at adapter for JRuby + Windows command name.
Merged r6274 from trunk.
scm: subversion: use "shell_quote_command" method at adapter for JRuby + Windows command name.
Merged r6272 from trunk.
scm: add new method "shell_quote_command" at abstract adapter.
