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-rw-r--r--lib/coderay/encoders/html/numbering.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/coderay/encoders/html/numbering.rb b/lib/coderay/encoders/html/numbering.rb
index 8bc6259..e717429 100644
--- a/lib/coderay/encoders/html/numbering.rb
+++ b/lib/coderay/encoders/html/numbering.rb
@@ -17,7 +17,7 @@ module Encoders
anchor_prefix = options[:line_number_anchors]
anchor_prefix = 'line' if anchor_prefix == true
- anchor_prefix = anchor_prefix.to_s[/\w+/] if anchor_prefix
+ anchor_prefix = anchor_prefix.to_s[/[\w-]+/] if anchor_prefix
anchoring =
if anchor_prefix
proc do |line|