debuginstall: expand the editor path before searching for it (issue4380) The editor launches without expanding the path with commits because the shell does that for us. If the path isn't an executable, the expanded path is displayed, which is probably more useful than the unexpanded path. For example, in cmd.exe, '~' expands to C:\Users\$user. But it expands to C:/mingw/msys/1.0/home/$user in MinGW.