RFR: 7419: Update XML parsing [v2]

[Evgeny Astigeevich]

> This patch fixes [JMC-7419](https://bugs.openjdk.java.net/browse/JMC-7419).
> Testing: `man verify`

Evgeny Astigeevich has updated the pull request incrementally with one additional commit since the last revision:

  Fixed formatting of the new code

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

Changes:
  - all: https://git.openjdk.java.net/jmc/pull/320/files
  - new: https://git.openjdk.java.net/jmc/pull/320/files/9ef7ce02..66291a61

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jmc&pr=320&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jmc&pr=320&range=00-01

  Stats: 9 lines in 1 file changed: 0 ins; 0 del; 9 mod
  Patch: https://git.openjdk.java.net/jmc/pull/320.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/320/head:pull/320

PR: https://git.openjdk.java.net/jmc/pull/320