fluent api style method chain formatting problem

[zpdDG4gta8XKpMCd]

Seen in 1.8 nightly build (1.8.0-dev.20151130)

// given:
new Start()
   .then(
      true,
      false
   ).then(
      1234,
      'xyz'
   ).then(
      'abc',
      '987'
   );

// actual:
new Start()
   .then(
   true,
   false
   ).then(
   1234,
   'xyz'
   ).then(
   'abc',
   '987'
   );

// expected:
new Start()
   .then(
      true,
      false
   ).then(
      1234,
      'xyz'
   ).then(
      'abc',
      '987'
   );

[magnushiie]

Note that as described in #14675, a trailing comma causes a different (although still incorrect indentation currently):

someVar
  .chain(
  'arg1',
  'arg2',
)
  .chain(
  3,
  4,
);

[DanielRosenwasser]

Thanks @saschanaz!