Non-ideal formatting on nested argument lists

[munificent]

Split out from #586:

Original code:

      body = combineStatements(
          new ExpressionStatement(
              lvalue.buildAssignment(
                  new VariableGet(variable), voidContext: true)),
          body);

Becomes:

      body = combineStatements(
          new ExpressionStatement(lvalue
              .buildAssignment(new VariableGet(variable), voidContext: true)),
          body);

I'm not sure why the heuristics pick the latter, but it would be nice if it could pick the former without making other code look worse.

[munificent]

The forthcoming tall style gives you:

      body = combineStatements(
        new ExpressionStatement(
          lvalue.buildAssignment(new VariableGet(variable), voidContext: true),
        ),
        body,
      );

That looks pretty good to me. It does a better job of showing the nesting structure of the calls.