Notable changes:
Scintilla:
- Add SC_ELEMENT_FOLD_LINE to set the colour of fold lines. Add SC_ELEMENT_HIDDEN_LINE to show where lines are hidden.
- On GTK, fix the line spacing so that underscores and accents are visible for some fonts such as DejaVu Sans Mono 10.
Lexilla
- Implement conditional group rules in CSS. Issue #25, Pull request #28.
- Check PHP numeric literals, showing invalid values with default style instead of numeric. Issue #20.
The CSS change causes compatiblity trouble. We exposed the changed
style in filetypes.css. Users must update local copies.
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