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 <miguel.barro@live.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/autoload/netrw.vim b/runtime/autoload/netrw.vim
index 0006d13..d9baabb 100644
--- a/runtime/autoload/netrw.vim
+++ b/runtime/autoload/netrw.vim
@@ -10668,7 +10668,7 @@
       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>"))