Re: Undocumented hyperlinks in doc strings.

[Richard Stallman]

      This means that a simple M-q can easily enable or disable
    several hyperlinks.  This does not seem good.  The change in
    `help-xref-symbol-regexp' treats newlines as any other whitespace.

Thanks for noticing and fixing this bug.  Please install your change.

Meanwhile, it might be another bug to allow more than one whitespace
character between words like `function' and the function name.
Multiple spaces never happen in normal text, only when there is
a sort of deliberate paragraph breaking or tabular structure.
In those cases, going across paragraphs or fields would probably
be a mistake.