Rename the test class so it does not read as term_attrs()

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: Mandar Wagh

Lib/test/test_curses.py

@@ -3248,7 +3248,7 @@ def test_color(self):
                  f"$TERM={term!r}, newterm() may not work")
 @unittest.skipIf(sys.platform == "cygwin",
                  "cygwin's curses mostly just hangs")
-class TermAttrsTests(NewtermTestBase):
+class TermattrsTests(NewtermTestBase):
     # A signed termattrs() only differs from an unsigned one on a terminal
     # that advertises the topmost bit of the mask, which is A_ITALIC.  Drive
     # a terminal type that supports italics over a pseudo-terminal instead of