Issue #19481: print() of string subclass instance in IDLE no more hangs.

diff --cc Lib/idlelib/PyShell.py
Simple merge

diff --cc Misc/NEWS
index e4797327fd2663426fc5901843bd416515d317af,535c3af0be44e50698768b29f9b534efb1a9af09..4190158d2d83119197d64401a7caaba9fa3194f8
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -128,6 -65,52 +128,11 @@@ Librar
  - Issue #19545: Avoid chained exceptions while passing stray % to
    time.strptime().  Initial patch by Claudiu Popa.
  
 -- Issue #19633: Fixed writing not compressed 16- and 32-bit wave files on
 -  big-endian platforms.
 -
 -- Issue #19449: in csv's writerow, handle non-string keys when generating the
 -  error message that certain keys are not in the 'fieldnames' list.
 -
 -- Fix test.support.bind_port() to not cause an error when Python was compiled
 -  on a system with SO_REUSEPORT defined in the headers but run on a system
 -  with an OS kernel that does not support that reasonably new socket option.
 -
 -- Fix compilation error under gcc of the ctypes module bundled libffi for arm.
 -
 -- Issue #19523: Closed FileHandler leak which occurred when delay was set.
 -
 -- Issue #13674: Prevented time.strftime from crashing on Windows when given
 -  a year before 1900 and a format of %y.
 -
 -- Issue #19544 and Issue #6286: Restore use of urllib over http allowing use
 -  of http_proxy for Distutils upload command, a feature accidentally lost
 -  in the rollback of distutils2.
 -
 -- Issue #19544 and Issue #7457: Restore the read_pkg_file method to
 -  distutils.dist.DistributionMetadata accidentally removed in the undo of
 -  distutils2.
 -
 -- Issue #1575020: Fixed support of 24-bit wave files on big-endian platforms.
 -
 -- Issue #19480: HTMLParser now accepts all valid start-tag names as defined
 -  by the HTML5 standard.
 -
 -- Issue #6157: Fixed tkinter.Text.debug().  Original patch by Guilherme Polo.
 -
 -- Issue #6160: The bbox() method of tkinter.Spinbox now returns a tuple of
 -  integers instead of a string.  Based on patch by Guilherme Polo.
 -
 -- Issue #10197: Rework subprocess.get[status]output to use subprocess
 -  functionality and thus to work on Windows. Patch by Nick Coghlan.
 -
 -- Issue #19286: Directories in ``package_data`` are no longer added to
 -  the filelist, preventing failure outlined in the ticket.
 -
+ IDLE
+ ----
+ 
+ - Issue #19481: print() of string subclass instance in IDLE no more hangs.
+ 
  Tests
  -----