From a7481361cf37221d658a58c5d7d686504479932e Mon Sep 17 00:00:00 2001
From: Patrick Thomson <patrickt@github.com>
Date: Thu, 6 Jul 2023 15:53:17 -0400
Subject: [PATCH] Treat leading _ character as private.

---
 highlight/src/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/highlight/src/lib.rs b/highlight/src/lib.rs
index d02196eb..c3a54f6c 100644
--- a/highlight/src/lib.rs
+++ b/highlight/src/lib.rs
@@ -389,7 +389,7 @@ impl HighlightConfiguration {
         return self
             .names()
             .iter()
-            .filter(|&n| !STANDARD_CAPTURE_NAMES.contains(n.as_str()))
+            .filter(|&n| !(n.starts_with('_') || STANDARD_CAPTURE_NAMES.contains(n.as_str())))
             .collect();
     }
 }