From 96ea6b6617cdf4ad7338e14eb4145b98611288b0 Mon Sep 17 00:00:00 2001
From: Jonathan Cheatham <jcheatham@zendesk.com>
Date: Thu, 29 May 2014 10:39:53 -0700
Subject: [PATCH] Add = highlight character to escape_chars list

---
 ext/redcarpet/markdown.c | 2 +-
 test/markdown_test.rb    | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/ext/redcarpet/markdown.c b/ext/redcarpet/markdown.c
index b4983bb9..98d880f8 100644
--- a/ext/redcarpet/markdown.c
+++ b/ext/redcarpet/markdown.c
@@ -845,7 +845,7 @@ char_quote(struct buf *ob, struct sd_markdown *rndr, uint8_t *data, size_t offse
 static size_t
 char_escape(struct buf *ob, struct sd_markdown *rndr, uint8_t *data, size_t offset, size_t size)
 {
-	static const char *escape_chars = "\\`*_{}[]()#+-.!:|&<>^~";
+	static const char *escape_chars = "\\`*_{}[]()#+-.!:|&<>^~=";
 	struct buf work = { 0, 0, 0, 0 };
 
 	if (size > 1) {
diff --git a/test/markdown_test.rb b/test/markdown_test.rb
index bc36051b..d59da596 100644
--- a/test/markdown_test.rb
+++ b/test/markdown_test.rb
@@ -285,6 +285,12 @@ def test_emphasis_escaping
     html_equal "<p><strong>foo*</strong> <em>dd_dd</em></p>\n", markdown
   end
 
+  def test_char_escaping_when_highlighting
+    markdown = "==attribute\\==="
+    output = render_with({highlight: true}, markdown)
+    html_equal "<p><mark>attribute=</mark></p>\n", output
+  end
+
   def test_ordered_lists_with_lax_spacing
     markdown = "Foo:\n1. Foo\n2. Bar"
     output = render_with({lax_spacing: true}, markdown)