Merge pull request #50 from Treri/master

match 'set-option -g @plugin' and 'set -g @plugin' both

scripts/helpers/plugin_functions.sh

@@ -43,7 +43,7 @@ tpm_plugins_list_helper() {
 
 	# read set -g @plugin "tmux-plugins/tmux-example-plugin" entries
 	_tmux_conf_contents "full" |
-		awk '/^ *set +-g +@plugin/ { gsub(/'\''/,""); gsub(/'\"'/,""); print $4 }'
+		awk '/^ *set(-option)? +-g +@plugin/ { gsub(/'\''/,""); gsub(/'\"'/,""); print $4 }'
 }
 
 # Allowed plugin name formats: