Gary Johnson wrote:

> ":help modeline" says:
> 
>     There are two forms of modelines.  The first form:
>             [text]{white}{vi:|vim:|ex:}[white]{options}
> 
>     [text]                  any text or empty
>     {white}                 at least one blank character (<Space> or <Tab>)
>     {vi:|vim:|ex:}          the string "vi:", "vim:" or "ex:"
>     [white]                 optional white space
>     {options}               a list of option settings, separated with white 
> space
>                             or ':', where each part between ':' is the 
> argument
>                             for a ":set" command (can be empty)
> 
> Note that the initial white space is not optional.  However, that
> initial white space is not actually required.  For example, create
> a file containing only the line
> 
>     vim: tw=40
> 
> left justified, open it with
> 
>     $ vim -N -u NONE demo
> 
> and execute:
> 
>     :verbose set tw?
>       textwidth=40
>           Last set from modeline line 1
> 
> I don't particularly care whether the documentation or the behavior
> is changed, but one should be to match the other.
> 
> I tested this using 8.1.2397.

I think it should be:

There are two forms of modelines.  The first form:
        [text{white}]{vi:|vim:|ex:}[white]{options}

[text{white}]           empty or any text followed by at least one blank
                        character (<Space> or <Tab>); "ex:" always requires at
                        least one blank character

The exception further down is hard to spot.

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