allow subcommand_path to match even with flags

With the old version flags between subcommands
weren't allowed (as it was doing exact match).
This solution is still not perfect (as it uses '.+')
and could potentially swallow other subcommands.

fish_completions.go

@@ -35,9 +35,10 @@ function __fish_%s_no_subcommand --description 'Test if %s has yet to be given t
 	return 0
 end
 function __fish_%s_seen_subcommand_path --description 'Test whether the full path of subcommands is the current path'
-	set -l cmd (commandline -opc)
-	set -e cmd[1]
-  return (test (string trim -- "$argv") = (string trim -- "$cmd"))
+	  set -l cmd (commandline -opc)
+	  set -e cmd[1]
+    set -l pattern (string replace -a " " ".+" "$argv")
+    string match -r "$pattern" (string trim -- "$cmd")
 end
 # borrowed from current fish-shell master, since it is not in current 2.7.1 release
 function __fish_seen_argument