fix: lualine restoration

[loqusion]

Problem

Before activating Zen Ataraxis, the value of 'statusline' is as follows:

%{%v:lua.require'lualine'.statusline()%}

After activating and deactivating it, here's the new value of 'statusline':

%!v:lua.require'lualine'.statusline()

Here's the relevant :help documentation for reference (see :h 'statusline' for full info):

    When the option starts with "%!" then it is used as an expression,
    evaluated and the result is used as the option value.  Example:
        :set statusline=%!MyStatusLine()
    The *g:statusline_winid* variable will be set to the |window-ID| of the
    window that the status line belongs to.
    The result can contain %{} items that will be evaluated too.
    Note that the "%!" expression is evaluated in the context of the
    current window and buffer, while %{} items are evaluated in the
    context of the window that the statusline belongs to.

...

    { NF  Evaluate expression between '%{' and '}' and substitute result.
          Note that there is no '%' before the closing '}'.  The
          expression cannot contain a '}' character, call a function to
          work around that.  See |stl-%{| below.
    {% -  This is almost same as { except the result of the expression is
          re-evaluated as a statusline format string.  Thus if the
          return value of expr contains % items they will get expanded.
          The expression can contain the } character, the end of
          expression is denoted by %}.
          For example:
        func! Stl_filename() abort
            return "%t"
        endfunc
            `stl=%{Stl_filename()}`   results in `"%t"`
            `stl=%{%Stl_filename()%}` results in `"Name of current file"`
    %} -  End of `{%` expression

Expected:

Actual:

[loqusion]

I also tested with multiple windows and laststatus=2, and it seems to be working properly on my end.

[pocco81]

Works well :+1: thanks again! :)