Allow hyperlink references with no surrounding backticks #570
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As you can see in the reSt spec it is not needed to surround hyperlink references with backticks:
In this case, only the first word before the underscore is used as reference (which is not the case with hyperlink targets btw, they allow space characters without surrounding backticks, as you can see in the test).
This currently breaks the linter in symfony/symfony-docs#12861