RFR: 1789: Skara PR commands are not interpreted on Github review comments [v3]

[Zhao Song]

> A user reported that Skara bots were not responding to commands in review comments or the body of a review. 
> 
> This patch addresses that issue by ensuring that the Skara bots can correctly detect and interpret commands.

Zhao Song has updated the pull request incrementally with one additional commit since the last revision:

  remove some comments and add tests

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

Changes:
  - all: https://git.openjdk.org/skara/pull/1458/files
  - new: https://git.openjdk.org/skara/pull/1458/files/377bab8c..c5cb717e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1458&range=02
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1458&range=01-02

  Stats: 17 lines in 2 files changed: 7 ins; 4 del; 6 mod
  Patch: https://git.openjdk.org/skara/pull/1458.diff
  Fetch: git fetch https://git.openjdk.org/skara pull/1458/head:pull/1458

PR: https://git.openjdk.org/skara/pull/1458