[Rev 01] RFR: Usign perl instead of sed

[Jesper Wilhelmsson]

> 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

-------------

Changes:
  - all: https://git.openjdk.java.net/guide/pull/10/files
  - new: https://git.openjdk.java.net/guide/pull/10/files/09f7c72f..13785f12

Webrevs:
 - full: https://webrevs.openjdk.java.net/guide/10/webrev.01
 - incr: https://webrevs.openjdk.java.net/guide/10/webrev.00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/guide/pull/10.diff
  Fetch: git fetch https://git.openjdk.java.net/guide pull/10/head:pull/10

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