Unreliable code extraction

[oruborus]

When extracting code using the source text referred to by the reflection of the Closure, the following possibilities are not handled correctly:

• a function surrounded by other function declarations on a single line

  function ($notThisOne) {}; $funciton = function ($thisOne) {}; function ($notThisOneEither) {};
  $rf = new ReflectionFunction($function);
  $code = ClosureTransformer::getCode($rf); // "function ($notThisOne) {}"

• an arrow function surrounded by other function declarations on a single line

  function ($notThisOne) {}; $funciton = fn($thisOne) => null; function ($notThisOneEither) {};
  $rf = new ReflectionFunction($function);
  $code = ClosureTransformer::getCode($rf); // "function ($notThisOne) {}"

• a static function surrounded by other function declarations on a single line

  function ($notThisOne) {}; $funciton = static function ($thisOne) {}; function ($notThisOneEither) {};
  $rf = new ReflectionFunction($function);
  $code = ClosureTransformer::getCode($rf); // "function ($notThisOne) {}"

• a static arrow function surrounded by other function declarations on a single line

  function ($notThisOne) {}; $funciton = static fn($thisOne) => null; function ($notThisOneEither) {};
  $rf = new ReflectionFunction($function);
  $code = ClosureTransformer::getCode($rf); // "function ($notThisOne) {}"

• more than one ignorable token between T_STATIC and T_FUNCTION

  $function = static /* ignore me */ function ($thisOne) {};
  $rf = new ReflectionFunction($function);
  $code = ClosureTransformer::getCode($rf); // "function ($thisOne) {}", note the missing "static /* ignore me */ "

• more than one ignorable token between T_STATIC and T_FN

  $function = static /* ignore me */ fn($thisOne) => null;
  $rf = new ReflectionFunction($function);
  $code = ClosureTransformer::getCode($rf); // "fn($thisOne) => null", note the missing "static /* ignore me */ "

• T_STATIC on a other line than T_FUNCTION

  $function = static
  function ($thisOne) {};
  $rf = new ReflectionFunction($function);
  $code = ClosureTransformer::getCode($rf); // "function ($thisOne) {}", note the missing "static "

• T_STATIC on a other line than T_FN

  $function = static
  fn($thisOne) => null;
  $rf = new ReflectionFunction($function);
  $code = ClosureTransformer::getCode($rf); // "fn($thisOne) => null", note the missing "static "

I can tackle that issue if you want - but I'd like to add more tests to avoid regressions.