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-rw-r--r--coverage/misc.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/coverage/misc.py b/coverage/misc.py
index 584efeaa..fa09f890 100644
--- a/coverage/misc.py
+++ b/coverage/misc.py
@@ -184,7 +184,7 @@ def bool_or_none(b):
def join_regex(regexes):
"""Combine a list of regexes into one that matches any of them."""
- return "|".join("(?:%s)" % r for r in regexes)
+ return "|".join(f"(?:{r})" for r in regexes)
def file_be_gone(path):