Update doc

doc/manpage_ocamlformat.mld

@@ -30,7 +30,9 @@ OPTIONS (CODE FORMATTING STYLE)
        no project root and no ocamlformat file has been found, and if the
        option enable-outside-detected-project is set, the global ocamlformat
        file defined in $XDG_CONFIG_HOME (or in $HOME/.config if
-       $XDG_CONFIG_HOME is undefined) is used.
+       $XDG_CONFIG_HOME is undefined) is used. In the next release,
+       Ocamlformat will be enabled by default, the presence of a project root
+       will not be checked unless [--on-save] is used.
 
        If the disable option is not set, an .ocamlformat-ignore file
        specifies files that OCamlFormat should ignore. Each line in an
@@ -547,7 +549,9 @@ OPTIONS
            parents they are applied, if no .ocamlformat file is found then
            the global configuration defined in $XDG_CONFIG_HOME/.ocamlformat
            (or in $HOME/.config/.ocamlformat if $XDG_CONFIG_HOME is
-           undefined) is applied.
+           undefined) is applied. In the next release, Ocamlformat will be
+           enabled by default, the presence of a project root will not be
+           checked unless --on-save is used.
 
        -g, --debug
            Generate debugging output. The flag is unset by default.
@@ -617,6 +621,10 @@ OPTIONS
            max_indent is an alias for max-indent. strict_with sets
            function-indent-nested and match-indent-nested.
 
+       --on-save
+           Make OCamlformat not format if no .ocamlformat file could be
+           found. For code editors.
+
        --print-config
            Print the configuration determined by the environment variable,
            the configuration files, preset profiles and command line.