Automatic detection of "Fixes" should be stricter

[tniessen]

In https://github.com/nodejs/node/pull/40613, [email protected] incorrectly adds a Fixes: metadata line:

----------------------------------- PR info ------------------------------------
Title      crypto: fix build without scrypt (#40613)
Author     Martin 'JaMa' Jansa <[email protected]> (@shr-project, first-time contributor)
Branch     shr-project:jansa/scrypt -> nodejs:master
Labels     crypto, c++, author ready
Commits    1
 - crypto: fix build without scrypt
Committers 1
 - Martin Jansa <[email protected]>
PR-URL: https://github.com/nodejs/node/pull/40613
Fixes: https://github.com/In
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Voltrex <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
------------------------------ Generated metadata ------------------------------
PR-URL: https://github.com/nodejs/node/pull/40613
Fixes: https://github.com/In
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Voltrex <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
--------------------------------------------------------------------------------

The commit message was:

crypto: fix build without scrypt

* add missing semicolon to fix:
  In file included from ../src/node_crypto.h:47,
                   from ../src/node.cc:46:
  ../src/crypto/crypto_scrypt.h:80:2:
  error: expected ';' after struct definition
     80 | }
        |  ^
        |  ;

  and fix typo in the comment

Signed-off-by: Martin Jansa <[email protected]>

_{(Original post in https://github.com/nodejs/node/pull/40613#issuecomment-966507251.)}

[richardlau]

I think it's being picked out of the body of the pull request description. The same issues is also often seen with the npm update pull requests.