Changed lambda to str.strip in _strip_spaces in logging.config (#4332)

diff --git a/Lib/logging/config.py b/Lib/logging/config.py
index b08cba0..7927e76 100644
--- a/Lib/logging/config.py
+++ b/Lib/logging/config.py
@@ -97,7 +97,7 @@
     return found
 
 def _strip_spaces(alist):
-    return map(lambda x: x.strip(), alist)
+    return map(str.strip, alist)
 
 def _create_formatters(cp):
     """Create and return formatters"""
@@ -185,7 +185,7 @@
     # configure the root first
     llist = cp["loggers"]["keys"]
     llist = llist.split(",")
-    llist = list(map(lambda x: x.strip(), llist))
+    llist = list(_strip_spaces(llist))
     llist.remove("root")
     section = cp["logger_root"]
     root = logging.root