From 0719b2de6572ea6027f8c4407154dd408dc29901 Mon Sep 17 00:00:00 2001
From: Noah Hellman <noah@hllmn.net>
Date: Sun, 12 Mar 2023 17:12:56 +0100
Subject: [PATCH] block: fix class attribute parsing

match reference implementation
---
 src/block.rs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/block.rs b/src/block.rs
index c7f5692..d108c62 100644
--- a/src/block.rs
+++ b/src/block.rs
@@ -734,9 +734,8 @@ impl IdentifiedBlock {
             f @ ('`' | ':' | '~') => {
                 let fence_length = 1 + (&mut chars).take_while(|c| *c == f).count();
                 let spec = &line_t[fence_length..].trim_start();
-                let valid_spec = if f == ':' && !spec.starts_with('=') {
-                    spec.chars().next().map_or(true, attr::is_name_start)
-                        && spec.chars().skip(1).all(attr::is_name)
+                let valid_spec = if f == ':' {
+                    spec.chars().all(attr::is_name)
                 } else {
                     !spec.chars().any(char::is_whitespace) && !spec.chars().any(|c| c == '`')
                 };