reformatting. These take the AST node to be reformatted (this may not literally
be an AST node from syntex_syntax: there might be multiple parameters
describing a logical node), the current indent, and the current width budget.
reformatting. These take the AST node to be reformatted (this may not literally
be an AST node from syntex_syntax: there might be multiple parameters
describing a logical node), the current indent, and the current width budget.