Some time ago, IDLE's main menu item 'Windows' was changed to 'Window'.  The latter seems to be pretty standard for a list of open windows.  Issue#33906 changed the implementation module name accordingly, from 'windows' to 'window'.  This issue is about changing the 'windows' key in mainmenu.menudef to 'window'. All other keys are the lower case version of the uppercase menu item.editor subscripts derived menudict with ['windows'] and menu_specs, which maps menudef keys to menu names, includes ('windows': '_Window'). pyshell also has menu_specsFunction and pseudoevent names that include 'windows'should be left alone.Besides the automated tests passing, the manual test will be that 'Window' works properly in all of Shell, editor window, and output window, as each is added.

New changeset33c7420e7dd9d8e5b2aa15e98da6291bab6fcf33 by Terry Jan Reedy in branch 'master':bpo-33924: Change IDLE mainmenu.menudefs key 'windows' to 'window' (GH-7836)https://github.com/python/cpython/commit/33c7420e7dd9d8e5b2aa15e98da6291bab6fcf33

New changesete1f0dceb266ae66a3b8ea9d087266f3960c59b2d by Miss Islington (bot) in branch '3.7':bpo-33924: Change IDLE mainmenu.menudefs key 'windows' to 'window' (GH-7836)https://github.com/python/cpython/commit/e1f0dceb266ae66a3b8ea9d087266f3960c59b2d

New changeset06deaf44d05471d9438502706cc09bb0e2ad3216 by Miss Islington (bot) in branch '3.6':bpo-33924: Change IDLE mainmenu.menudefs key 'windows' to 'window' (GH-7836)https://github.com/python/cpython/commit/06deaf44d05471d9438502706cc09bb0e2ad3216

New changeset42397731d7ba8bdf63025d48008d133cb2070229 by Terry Jan Reedy (Mark Roseman) in branch 'master':bpo-33924: Add missed mac-specific 'windows' to 'window' changes (GH-7920)https://github.com/python/cpython/commit/42397731d7ba8bdf63025d48008d133cb2070229

New changesetee60e36fbf640e9e2ab6cd26821aad5d90529d96 by Miss Islington (bot) in branch '3.7':bpo-33924: Add missed mac-specific 'windows' to 'window' changes (GH-7920)https://github.com/python/cpython/commit/ee60e36fbf640e9e2ab6cd26821aad5d90529d96

New changesetc6040638aa1537709add895d24cdbbb9ee310fde by Miss Islington (bot) in branch '3.6':bpo-33924: Add missed mac-specific 'windows' to 'window' changes (GH-7920)https://github.com/python/cpython/commit/c6040638aa1537709add895d24cdbbb9ee310fde

Mark's PR added two conversions, in macosx, that I missed.  I rechecked a recursive case sensitive whole-word grep of 'windows' in idlelib and I believe all remaining occurrences refer to the Windows OS (usually capitalized) or multiple windows.