Discrepancy between modeline help and behavior

[Gary Johnson]

":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.

Regards,
Gary

[Andy Massimino]

It says a little further down "There is one exception:" that the whitespace is optional if v is the first character on the line.  

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[Bram Moolenaar]

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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