[Rev 01] RFR: Usign perl instead of sed

[Iris Clark]

On Tue, 26 May 2020 23:34:42 GMT, Jesper Wilhelmsson <jwilhelm at openjdk.org> wrote:

>> It turns out that different common versions of sed behaves differently so the suggestion here is to replace it with
>> perl.
>
> Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Use html4

Looks good.

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Marked as reviewed by iris (Reviewer).

PR: https://git.openjdk.java.net/guide/pull/10