RE: Docstring line length

[Drew Adams]

       The reason given for 67 for the first line was apparently
       its appearance in *Apropos*. I don't see the point of this.

    For defcustoms there still is another reason for the first line of the
    docstring not being too long: if you click on [More] in a Custom
    buffer and the more changes to [Hide Rest], the docstring can look
    _really_ ugly with a long first line.

Fair enough. How long is too long? What's a good guideline? Do you think the
cut-off for the first line should be <, =, or > the cut-off for subsequent
lines? I vote for 70 for all doc-string lines.