modeline documentation is misleading

[Bruno Bronosky]

https://github.com/vim/vim/blame/e0720cbf63eb3045be8d965e3182c0c392c7b5e9/runtime/doc/options.txt#L505

The second form (this is compatible with some versions of Vi):

https://github.com/vim/vim/blame/e0720cbf63eb3045be8d965e3182c0c392c7b5e9/runtime/doc/options.txt#L513-L514

se[t] the string "set " or "se " (note the space); When

"Vim" is used it must be "set".

The first line came in with v7. The last line was added many (7+?) years later. I'd like to change the first line to say...

https://github.com/RichardBronosky/vim/commit/9e96fc0a79b5a1d2563cf0462a7f81db397b10ef

The second form (this is compatible with some pre-7.0 versions of Vi):

.!# BrunoBronosky #!.

[Ben Fritz]

Vi is not the same as Vim. The second form works in all versions of Vim.

[Tony Mechelynck]

Both forms existed long before Vim 7: when I first used Vim (vim 6.1)
they already existed with the exact same help text, and I believe that
Vim 5 or earlier already had them too. "vi" in this paragraph means,
not "Vim when named vi" and not "vim when 'compatible' is set" but
"legacy vi, the earlier program, not by Bram Moolenaar". "pre-7.0" has
no meaning by respect to legacy vi, whose versioning system has
nothing in common with Vim's.

Best regards,
Tony.