gh-97928: Fix handling options starting with "-" in tkinter.Text.count() (GH-98436)

Previously they were silently ignored. Now they are errors.

Author: serhiy-storchaka

Lib/test/test_tkinter/test_text.py

@@ -76,9 +76,7 @@ def test_count(self):
         self.assertEqual(text.count('1.0', 'end'), (124,)  # 'indices' by default
                          if self.wantobjects else ('124',))
         self.assertRaises(tkinter.TclError, text.count, '1.0', 'end', 'spam')
-        # '-lines' is ignored, 'indices' is used by default
-        self.assertEqual(text.count('1.0', 'end', '-lines'), (124,)
-                         if self.wantobjects else ('124',))
+        self.assertRaises(tkinter.TclError, text.count, '1.0', 'end', '-lines')
 
         self.assertIsInstance(text.count('1.3', '1.5', 'ypixels'), tuple)
         self.assertIsInstance(text.count('1.3', '1.5', 'update', 'ypixels'), int

Lib/tkinter/__init__.py

@@ -3648,7 +3648,7 @@ def count(self, index1, index2, *args): # new in Tk 8.5
         "lines", "xpixels" and "ypixels". There is an additional possible
         option "update", which if given then all subsequent options ensure
         that any possible out of date information is recalculated."""
-        args = ['-%s' % arg for arg in args if not arg.startswith('-')]
+        args = ['-%s' % arg for arg in args]
         args += [index1, index2]
         res = self.tk.call(self._w, 'count', *args) or None
         if res is not None and len(args) <= 3:

Misc/NEWS.d/next/Library/2022-10-19-09-29-12.gh-issue-97928.xj3im7.rst

@@ -0,0 +1,2 @@
+:meth:`tkinter.Text.count` raises now an exception for options starting with
+"-" instead of silently ignoring them.