From 14c84204b1596ac8d4122b31b2f3cf06e655d098 Mon Sep 17 00:00:00 2001
From: Alexandre Constantino <dreaming.about.electric.sheep@gmail.com>
Date: Wed, 10 Feb 2016 19:41:33 +0000
Subject: [PATCH] Fix URL syntax regex

Enables domain names that start with digits
---
 syntax/markdown.vim | 4 ++--
 test/syntax.vader   | 6 ++++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/syntax/markdown.vim b/syntax/markdown.vim
index 9e0eb49..07adae9 100644
--- a/syntax/markdown.vim
+++ b/syntax/markdown.vim
@@ -62,8 +62,8 @@ execute 'syn region mkdLink matchgroup=mkdDelimiter  start="\\\@<!!\?\[" end="\n
 
 " Autolink without angle brackets.
 " mkd  inline links:           protocol   optional  user:pass@       sub/domain                 .com, .co.uk, etc      optional port   path/querystring/hash fragment
-"                            ------------ _____________________ --------------------------- ________________________ ----------------- __
-syntax match   mkdInlineURL /https\?:\/\/\(\w\+\(:\w\+\)\?@\)\?\([A-Za-z][-_0-9A-Za-z]*\.\)\{1,}\(\w\{2,}\.\?\)\{1,}\(:[0-9]\{1,5}\)\?\S*/
+"                            ------------ _____________________ ----------------------------- ________________________ ----------------- __
+syntax match   mkdInlineURL /https\?:\/\/\(\w\+\(:\w\+\)\?@\)\?\([A-Za-z0-9][-_0-9A-Za-z]*\.\)\{1,}\(\w\{2,}\.\?\)\{1,}\(:[0-9]\{1,5}\)\?\S*/
 
 " Autolink with parenthesis.
 syntax region  mkdInlineURL matchgroup=mkdDelimiter start="(\(https\?:\/\/\(\w\+\(:\w\+\)\?@\)\?\([A-Za-z][-_0-9A-Za-z]*\.\)\{1,}\(\w\{2,}\.\?\)\{1,}\(:[0-9]\{1,5}\)\?\S*)\)\@=" end=")"
diff --git a/test/syntax.vader b/test/syntax.vader
index 8ac0a28..5286b0b 100644
--- a/test/syntax.vader
+++ b/test/syntax.vader
@@ -217,6 +217,12 @@ Execute (autolink):
   AssertEqual SyntaxOf('>'), 'mkdDelimiter'
   AssertNotEqual SyntaxOf('c'), 'mkdInlineURL'
 
+Given markdown;
+http://12monkeys.foo
+
+Execute (autolink with domain starting with a number):
+  AssertEqual SyntaxOf('12monkeys'), 'mkdInlineURL'
+
 Given markdown;
 <HtTp://a>
 
-- 
2.39.2