review: fix: Fix missing parens for (string + string).contains(...)

[Luro02]

For the code (string + string).contains(string) will remove the parenthesis which results in string + string.contains(string)

[SirYwell]

The change looks good, but I think this is something where we need to go through all expressions and check whether they need parentheses. But I can do that as a follow-up PR.