Allow specifying fzf options in $FZF_TMUX_OPTS without '--'

src/options.go

@@ -1544,6 +1544,8 @@ func parseOptions(opts *Options, allArgs []string) {
 			opts.ClearOnExit = false
 		case "--version":
 			opts.Version = true
+		case "--":
+			// Ignored
 		default:
 			if match, value := optString(arg, "--algo="); match {
 				opts.FuzzyAlgo = parseAlgo(value)