patch 9.0.1834: Some problems with xxd coloring Commit: https://github.com/vim/vim/commit/f6fc255e8d9c46a0e51e03f16a508833d309dee6 Author: K.Takata <kentkt@csc.jp> Date: Fri Sep 1 18:41:04 2023 +0200 patch 9.0.1834: Some problems with xxd coloring Problem: Some problems with xxd coloring Solution: Fix the following problems: * Support colored output on Windows. SetConsoleMode() is required to enable ANSI color sequences. * Support "NO_COLOR" environment variable. If "NO_COLOR" is defined and not empty, colored output should be disabled. See https://no-color.org/ * "-R" should only accept "always", "never" or "auto" as the parameter. * Adjust help and documentation. "-R" cannot omit the parameter. Remove surrounding brackets. Related #12131 closes: #12997 closes: #12991 closes: #12986 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: K.Takata <kentkt@csc.jp>