Add PYTHONUTF8 to commandline usage. (GH-17587)

methane · vstinner · web-flow · commit 95826c773a90 · 2019-12-14T14:27:32.000+09:00
Co-Authored-By: Victor Stinner &lt;vstinner@python.org&gt;
diff --git a/Python/initconfig.c b/Python/initconfig.c
@@ -80,6 +80,7 @@ static const char usage_5[] =
 "PYTHONHOME   : alternate <prefix> directory (or <prefix>%lc<exec_prefix>).\n"
 "               The default module search path uses %s.\n"
 "PYTHONCASEOK : ignore case in 'import' statements (Windows).\n"
+"PYTHONUTF8: if set to 1, enable the UTF-8 mode.\n"
 "PYTHONIOENCODING: Encoding[:errors] used for stdin/stdout/stderr.\n"
 "PYTHONFAULTHANDLER: dump the Python traceback on fatal errors.\n";
 static const char usage_6[] =
