simplify/robustify exec command used for edit action, and fake-redirect stderr so it can't make tcl think the command failed
simplify/robustify exec command used for edit action, and fake-redirect stderr so it can't make tcl think the command failed

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@69887 d073be05-634f-4543-b044-5fe20cf6d1d6

neverpanic/macports-base,macports/macports-base,neverpanic/macports-base,macports/macports-base,danchr/macports-base,danchr/macports-base