From af966a34cd344fd4b963f0dbaeedb209b7d5bee7 Mon Sep 17 00:00:00 2001
From: tlylt <liu_yongliang@hotmail.com>
Date: Tue, 28 Dec 2021 20:20:25 +0800
Subject: [PATCH 1/2] hr elements does not accept multiple classes

Like other elements, hr elements should also allow multiple
classes to be added. Currently, hr elements have a direct
assignment of attributes in patterns.js. Thus, multiple
class attributes are not combined into one.

By using the `utils.addAttrs` method, the attribute values
will be merged correctly.

This bug fix helps with attributes on hr elements.
Example:`--- {.a .b}`
Before:`<hr class='a' class='b'>`
After: `<hr class='a b'>`
---
 patterns.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/patterns.js b/patterns.js
index 0744a7b..1acec80 100644
--- a/patterns.js
+++ b/patterns.js
@@ -296,7 +296,8 @@ module.exports = options => {
         token.nesting = 0;
         let content = tokens[i + 1].content;
         let start = content.lastIndexOf(options.leftDelimiter);
-        token.attrs = utils.getAttrs(content, start, options);
+        let attrs = utils.getAttrs(content, start, options);
+        utils.addAttrs(attrs, token);
         token.markup = content;
         tokens.splice(i + 1, 2);
       }

From 7043c29a79ec4957291f2eaa21bc0ad98d541c24 Mon Sep 17 00:00:00 2001
From: tlylt <liu_yongliang@hotmail.com>
Date: Tue, 28 Dec 2021 21:12:34 +0800
Subject: [PATCH 2/2] add test for <hr> multiple classes

---
 test.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test.js b/test.js
index 5589436..bffdae9 100644
--- a/test.js
+++ b/test.js
@@ -389,6 +389,12 @@ function describeTestsWithOptions(options, postText) {
       expected = '<p class="someclass" attr="allowed">text</p>\n';
       assert.equal(md.render(replaceDelimiters(src, options)), expected);
     });
+
+    it(replaceDelimiters('should support multiple classes for <hr>', options), () => {
+      src = '--- {.a .b}';
+      expected = '<hr class="a b">\n';
+      assert.equal(md.render(replaceDelimiters(src, options)), expected);
+    });
   });
 }