Issue #18817: Fix a resource warning in Lib/aifc.py demo.

Lib/aifc.py

@@ -953,6 +953,7 @@ if __name__ == '__main__':
         sys.argv.append('/usr/demos/data/audio/bach.aiff')
     fn = sys.argv[1]
     f = open(fn, 'r')
+    try:
         print "Reading", fn
         print "nchannels =", f.getnchannels()
         print "nframes   =", f.getnframes()
@@ -964,12 +965,15 @@ if __name__ == '__main__':
             gn = sys.argv[2]
             print "Writing", gn
             g = open(gn, 'w')
+            try:
                 g.setparams(f.getparams())
                 while 1:
                     data = f.readframes(1024)
                     if not data:
                         break
                     g.writeframes(data)
+            finally:
                 g.close()
-        f.close()
             print "Done."
+    finally:
+        f.close()

Misc/NEWS

@@ -141,6 +141,8 @@ Library
 Tools/Demos
 -----------
 
+- Issue #18817: Fix a resource warning in Lib/aifc.py demo.
+
 - Issue #18439: Make patchcheck work on Windows for ACKS, NEWS.
 
 - Issue #18448: Fix a typo in Demo/newmetaclasses/Eiffel.py.