Obscure Vi bug?

[Paul Chamberlain]

In article <1990Aug2.211835.24599 at math-cs.kent.edu> jstuart at math-cs.kent.edu (Jeff Stuart) writes:
>We have a problem here also with vi that when you edit a file and that
>file contains an ei: possibly followed by some text and then another :
>vi gives an error message.

This sounds like the (now removed?) feature of embedding vi initialization
commands in the first few lines of a text file and giving some (I can't
remember) delimiter to indicate.  I thought it was something like:

	exmodes: set ts=4:

No doubt somebody will correct me.

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