From 2cb6400773096b02b71c1851fb0fac5dfefbbd6f Mon Sep 17 00:00:00 2001
From: Jermolene <jeremy@jermolene.com>
Date: Mon, 13 Jul 2015 14:42:55 +0100
Subject: [PATCH] Extend automatic system tiddler linking to digits and
 underscore

Fixes #1877
---
 core/modules/parsers/wikiparser/rules/syslink.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/modules/parsers/wikiparser/rules/syslink.js b/core/modules/parsers/wikiparser/rules/syslink.js
index c3f49e38f..4c559262b 100644
--- a/core/modules/parsers/wikiparser/rules/syslink.js
+++ b/core/modules/parsers/wikiparser/rules/syslink.js
@@ -18,7 +18,7 @@ exports.types = {inline: true};
 exports.init = function(parser) {
 	this.parser = parser;
 	// Regexp to match
-	this.matchRegExp = /~?\$:\/[a-zA-Z/.-]+/mg;
+	this.matchRegExp = /~?\$:\/[a-zA-Z0-9/.-_]+/mg;
 };
 
 exports.parse = function() {