From 71c59ea0327f99bd2635308057d92bc4d1f12721 Mon Sep 17 00:00:00 2001
From: Stan Hu <stanhu@gmail.com>
Date: Sun, 14 Mar 2021 11:21:00 -0700
Subject: [PATCH] Restrict Rouge formatters to values in Rouge::Formatters
 namespace

ff0218aefcf00cd5a389e17e075d36cd46d011e2 added support for specifying
custom Rouge formatters, but it did not actually enforce this constraint.
For example, this is valid:

```ruby
Rouge::Formatters.const_get('CSV')
=> CSV
```

Adding the `false` parameter to `const_get` prevents this:

```ruby
Rouge::Formatters.const_get('CSV', false)
NameError: uninitialized constant Rouge::Formatters::CSV
```
---
 lib/kramdown/converter/syntax_highlighter/rouge.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/kramdown/converter/syntax_highlighter/rouge.rb b/lib/kramdown/converter/syntax_highlighter/rouge.rb
index c799526c..ed6a4f83 100644
--- a/lib/kramdown/converter/syntax_highlighter/rouge.rb
+++ b/lib/kramdown/converter/syntax_highlighter/rouge.rb
@@ -70,7 +70,7 @@ def self.formatter_class(opts = {})
       when Class
         formatter
       when /\A[[:upper:]][[:alnum:]_]*\z/
-        ::Rouge::Formatters.const_get(formatter)
+        ::Rouge::Formatters.const_get(formatter, false)
       else
         # Available in Rouge 2.0 or later
         ::Rouge::Formatters::HTMLLegacy