Formatting hash with symbol shorthand and non-symbol key is invalid

[maxnotarangelo]

Pre-formatted:

first = "hello"
hsh = { first:, "second" => "bye" }

After formatting:

first = "hello"
hsh = { :first =>, "second" => "bye" }

This is with version 6.0.0 of syntax_tree.

[maxnotarangelo]

Thanks!