From 7ff93a9740da5dec4eba6c6cad288d25a472d75a Mon Sep 17 00:00:00 2001
From: Ned Batchelder <ned@nedbatchelder.com>
Date: Sun, 20 Dec 2020 20:19:49 -0500
Subject: Use set literals

---
 coverage/collector.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'coverage/collector.py')

diff --git a/coverage/collector.py b/coverage/collector.py
index 9333d66a..a4f1790d 100644
--- a/coverage/collector.py
+++ b/coverage/collector.py
@@ -55,7 +55,7 @@ class Collector(object):
     _collectors = []
 
     # The concurrency settings we support here.
-    SUPPORTED_CONCURRENCIES = set(["greenlet", "eventlet", "gevent", "thread"])
+    SUPPORTED_CONCURRENCIES = {"greenlet", "eventlet", "gevent", "thread"}
 
     def __init__(
         self, should_trace, check_include, should_start_context, file_mapper,
-- 
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