RFR(S): 8237589: Fix copyright header formatting

[Jesper Wilhelmsson]

Looks good. (All files)
/Jesper

> On 21 Jan 2020, at 21:46, Mikael Vidstedt <mikael.vidstedt at oracle.com> wrote:
> 
> 
> Please review this change which fixes the copyright headers for 300+ files. The vast majority of the changes are related to the formatting of the year ranges, but there are a few other types of fixes in there in an attempt to keep you awake while reviewing this.
> 
> jbs: https://bugs.openjdk.java.net/browse/JDK-8237589
> webrev: https://cr.openjdk.java.net/~mikael/webrevs/8237589/webrev.00/open/webrev/
> 
> Cheers,
> Mikael
>