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By default, Vim uses the non-standard, but widely supported, legacy xterm/Konsole format for setting "direct colors" with set setaf and setbf escape codes, which use semicolons as separators. The documentation for xterm-true-color mentions that, as an alternative, users can set alternative sequences that use colons instead of semicolons. This format, though, isn't standard and it is unclear how widely supported it is; it was added by xterm patch 282 due to a misinterpretation of the ISO 8613-6 (ITU T.416) standard, and was later changed to the format suggested by this patch, which is the one specified in the standard. Today, looking at ncurses' [terminfo], it seems that all terminal emulators use either the standard format (named "xterm+direct" in the terminfo source) or the legacy format (named "xterm+indirect" in the terminfo source). Hence, I believe it makes sense to align the docs with reality. If you're interested in the story of this escape sequence, I'd recommend reading <https://invisible-island.net/ncurses/ncurses.faq.html#xterm_16MegaColors>. [terminfo]: https://invisible-island.net/ncurses/terminfo.ti.html closes: #16350 Signed-off-by: Christian Brabandt <cb@256bit.org> Signed-off-by: Andrea Pappacoda <andrea@pappacoda.it>
