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-rw-r--r--abdl/__init__.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/abdl/__init__.py b/abdl/__init__.py
index 547bb68..efcd3df 100644
--- a/abdl/__init__.py
+++ b/abdl/__init__.py
@@ -88,6 +88,8 @@ Language Reference:
         needs to be careful when writing code where such behaviour could
         result in a security vulnerability.
 
+        The empty pattern matches anything, but only does so once.
+
     Syntax of ABDL Expressions:
 
         ABDL Expressions follow the given syntax, in (pseudo-)extended BNF::