Alexander Rinass [off-list ref] writes:
Sticking a precompose_argv(argc, argv) into diff.c’s cmd_diff
function fixes the issue.
But I had to disable the check (precomposed_unicode != 1) in
precompose_argv to make it work. That’s probably because
precompose_argv is usually called from parse_options and is
missing some other call before it?
The "precomposed_unicode" bit comes from your configuration file,
so it won't be usable before you call into git_default_core_config
and that happens via a call to "git_config(git_diff_ui_config, NULL)".
So perhaps you'd want to add the argv munging immediately before
init_revisions() call there?