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-rw-r--r--coverage/results.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/coverage/results.py b/coverage/results.py
index 11c4b09b..64e5130c 100644
--- a/coverage/results.py
+++ b/coverage/results.py
@@ -317,7 +317,7 @@ def format_lines(statements, lines, arcs=None):
for ex in sorted(exits):
if line not in lines and ex not in lines:
dest = (ex if ex > 0 else "exit")
- line_items.append((line, "%d->%s" % (line, dest)))
+ line_items.append((line, f"{line}->{dest}"))
ret = ', '.join(t[-1] for t in sorted(line_items))
return ret