Doc: Add documentation for --loglevel for all python scripts

[lilypond.git] / Documentation / usage / updating.itely

diff --git a/Documentation/usage/updating.itely b/Documentation/usage/updating.itely
index 8bb8cef9260a059ecbdd2b83a14ecf9e3593293e..7f4afa85463391b6421d6ab42b66bf70797e9394 100644 (file)
--- a/Documentation/usage/updating.itely
+++ b/Documentation/usage/updating.itely
@@ -147,6 +147,11 @@ available version.  E.g. @option{--to=2.12.2}
 
 @item -h, --help
 Print usage help.
+
+@item -l @var{loglevel}, --loglevel=@var{loglevel}
+Set the output verbosity to @var{loglevel}. Possible values are @code{NONE},
+@code{ERROR}, @code{WARNING}, @code{PROGRESS} (default) and @code{DEBUG}.
+
 @end table
 
 To upgrade LilyPond fragments in texinfo files, use