minor #2314 add a comma to clarify the meaning (xabbuh)
minor #2314 add a comma to clarify the meaning (xabbuh)

This PR was merged into the 1.x branch.

Discussion
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add a comma to clarify the meaning

Without the comma you could understand that the "if" not only applied
to `-1`, but to `1` as well if you read too quickly.

Commits
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7cd3c9d add a comma to clarify the meaning

gamernetwork/Twig,twigphp/Twig,gencer/Twig,twigphp/Twig,gamernetwork/Twig,nicolas-grekas/Twig,twigphp/Twig,nicolas-grekas/Twig,nicolas-grekas/Twig,nicolas-grekas/Twig,gencer/Twig,nicolas-grekas/Twig,gamernetwork/Twig