Pattern-matching of bool value is formatted to ternary if we match true first

[denis-ok]

When pattern-matching boolean values, it's common to match the true value first. However, this approach can lead to undesirable formatting behavior. For instance:

This:

switch (condition) {
| true => ()
| false => ()
};

Formats to:

condition ? () : ();

Sometimes a code style when we first match a shorter branch (with less code) is preferred.
To prevent automatic formatting to a ternary expression in such cases we have to match false as a wildcard _false.

switch (condition) {
| true =>
  // short code
  ()
| _false => 
  // long code
  // long code
  // long code
  ()
};