Include trailing comma in single param vertical fn#6890
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When formatting a function with a single parameter with `fn_params_layout` set to `Vertical`, the previous tactic would remove any trailing commas before spilling to multiple lines for other reasons, such as long function names or return types. Instead, use the same tactic as `Tall` does, so that the trailing comma is kept if the end result spans multiple lines. Issue rust-lang#6889 `fn_params_layout = "Vertical"` removes single argument's trailing comma
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When formatting a function with a single parameter with
fn_params_layoutset toVertical, the previous tactic would remove any trailing commas before spilling to multiple lines for other reasons, such as long function names or return types. Instead, use the same tactic asTalldoes, so that the trailing comma is kept if the end result spans multiple lines.Resolves #6889
fn_params_layout = "Vertical"removes single argument's trailing comma