3.9 stable relax tests for rouge and pygments

[dleidert]

This is a 🐛 bug fix. It fixes two tests.

[x] The test suite passes on travis https://travis-ci.com/github/dleidert/jekyll/builds/192890708

Summary

The php lexer was rewritten in Rouge 3.22 leading to a slightly different output. One test is relaxed to fit both rouge before and after version 3.22.

Also an update of pygments (we have 2.7.1) leads to a slightly different test result. The test is fixed to accept old and new pygments output too.

Context

This is related to and closes #8436.

[ashmaroli]

• In case you didn't know, %() is interpreted into strings and %r{} is interpreted onto regexes.
• Our regex-style is %r!! instead of %r{}. (I don't know why RuboCop isn't flagging these as offenses..).
• When converting a heredoc into a regex, you need to add the /x qualifier to disregard the newline whitespace:

  %r!
    <pre>
      foo
    </pre>
  !x

[dleidert]

• In case you didn't know, %() is interpreted into strings and %r{} is interpreted onto regexes.

I know. The change is intentional. Both affected tests need regexes. For pygments the putput changes from

- <span class="lineno">1 </span>
+ <span class="linenos">1</span>

• Our regex-style is %r!! instead of %r{}. (I don't know why RuboCop isn't flagging these as offenses..).

Didn't know that. Fixed it.

• When converting a heredoc into a regex, you need to add the /x qualifier to disregard the newline whitespace:

  %r!
    <pre>
      foo
    </pre>
  !x

I don't think this applies here. /x would strip all whitespace. Also the newlines in the rouge regex are correct and have to be there. I haven't found any way to preserve the newline in the pygments output and still match both output results. So the only way was to unify the two lines into one.