ScalaDoc short line break problem.

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Currently ScalaDoc prints the initial line of documentation with a button to expand to the full form.

It looks like the rule is to break after the first period.

So if we have the following doc:

"Version is 2.3.6. Next line here."

The first line displayed is "Version is 2."

It should ideally be "Version is 2.3.6."

This can be done by changing the break rule to first period followed by a blank space character (space, sol, tab, ...).

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Imported From: https://issues.scala-lang.org/browse/SI-8672?orig=1
Reporter: John Nestor (nestorpersist)

[scabug]

@retronym said:
scala/scala#3824