bpo-45428: Fix reading filenames from stdin in py_compile (GH-28848)

Strip trailing '\n'.

Lib/py_compile.py

@@ -190,7 +190,7 @@ def main():
     )
     args = parser.parse_args()
     if args.filenames == ['-']:
-        filenames = sys.stdin.readlines()
+        filenames = [filename.rstrip('\n') for filename in sys.stdin.readlines()]
     else:
         filenames = args.filenames
     for filename in filenames:

Misc/NEWS.d/next/Library/2021-10-14-18-04-17.bpo-45428.mM2War.rst

@@ -0,0 +1 @@
+Fix a regression in py_compile when reading filenames from standard input.