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-rw-r--r--pygments/lexers/dsls.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/pygments/lexers/dsls.py b/pygments/lexers/dsls.py
index dcd15011..e4ec2312 100644
--- a/pygments/lexers/dsls.py
+++ b/pygments/lexers/dsls.py
@@ -87,7 +87,7 @@ class BroLexer(RegexLexer):
aliases = ['bro']
filenames = ['*.bro']
- _hex = r'[0-9a-fA-F_]+'
+ _hex = r'[0-9a-fA-F_]'
_float = r'((\d*\.?\d+)|(\d+\.?\d*))([eE][-+]?\d+)?'
_h = r'[A-Za-z0-9][-A-Za-z0-9]*'