Antialiasing cannot be adjusted on fonts rendered with MSDF.
Internally, Godot always uses grayscale antialiasing for those fonts.
This also tweaks property hints for consistency, and renames
uses of "sub-pixel" to the more commonly used "subpixel".
- Removed empty paragraphs in XML.
- Consistently use bold style for "Example:", on a new line.
- Fix usage of `[code]` when hyperlinks could be used (`[member]`, `[constant]`).
- Fix invalid usage of backticks for inline code in BBCode.
- Fix some American/British English spelling inconsistencies.
- Other minor fixes spotted along the way, including typo fixes with codespell.
- Don't specify `@GlobalScope` for `enum` and `constant`.
