runtime(netrw): fixing remote file removal via ssh (#13942)

Make pattern, which retrieves the path component from e.g. 
`scp://user@host//opt/program/file.ext` non-greedy.

Signed-off-by: GuyBrush <[email protected]>
Signed-off-by: Christian Brabandt <[email protected]>

Author: MiguelBarro

runtime/autoload/netrw.vim

@@ -10668,7 +10668,7 @@ fun! s:NetrwRemoteRmFile(path,rmfile,all)
       NetrwKeepj call netrw#ErrorMsg(s:ERROR,"for some reason b:netrw_curdir doesn't exist!",53)
       let ok="q"
      else
-      let remotedir= substitute(b:netrw_curdir,'^.*//[^/]\+/\(.*\)$','\1','')
+      let remotedir= substitute(b:netrw_curdir,'^.\{-}//[^/]\+/\(.*\)$','\1','')
 "      call Decho("netrw_rm_cmd<".netrw_rm_cmd.">",'~'.expand("<slnum>"))
 "      call Decho("remotedir<".remotedir.">",'~'.expand("<slnum>"))
 "      call Decho("rmfile<".a:rmfile.">",'~'.expand("<slnum>"))