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6d86a6fe44
Problems: 1. The test case for querying truecolor support did not check which capabilities were queried 2. The test case for querying truecolor support checked `&termguicolors` in the Nvim test runner, not the child Nvim in the the embedded terminal 3. The test case for querying truecolor support did not actually respond to the XTGETTCAP requests. `'termguicolors'` is still enabled even without responding to this query because libvterm understands and responds to the DECRQSS request, but it is still good to respond to the query explicitly instead of depending on hidden libvterm behavior 4. No test case exists at all for OSC 52 Solution: Fix all of the problems listed above.