Charles-P. Clermont c270a6f378 Add ParseTreeVisitor to Echo tag ...

This fixes theme-check#218, wherein variables used in echo tags are not
considered used by the linter. It is because our visitor doesn't see the
:variable_lookup's in the echo tag since the children array is empty.
But this array is empty because it is swallowed by the @variable.

2021-03-24 09:35:43 -04:00

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