Hi @nikral,
Thank you for your contribution,
Please fix below Drupal coding standard issues,
FILE: .../optional_end_month_year_range/js/optional_end_month_year_range.js
-------------------------------------------------------------------------------------------------------
FOUND 2 ERRORS AFFECTING 2 LINES
-------------------------------------------------------------------------------------------------------
12 | ERROR | [x] Expected 1 space after FUNCTION keyword; 0 found
19 | ERROR | [x] Expected 1 space after FUNCTION keyword; 0 found
-------------------------------------------------------------------------------------------------------
PHPCBF CAN FIX THE 2 MARKED SNIFF VIOLATIONS AUTOMATICALLY
-------------------------------------------------------------------------------------------------------
FILE: .../optional_end_month_year_range/src/Plugin/Field/FieldWidget/OptionalEndMonthYearRangeWidget.php
------------------------------------------------------------------------------------------------------------------------------------
FOUND 5 ERRORS AFFECTING 5 LINES
------------------------------------------------------------------------------------------------------------------------------------
123 | ERROR | [x] Doc comment short description must end with a full stop
124 | ERROR | [x] There must be exactly one blank line before the tags in a doc comment
130 | ERROR | [x] Parameter comment must end with a full stop
131 | ERROR | [x] Separate the @param and @return sections by a blank line.
146 | ERROR | [ ] Doc comment short description must be on a single line, further text should be a separate paragraph
------------------------------------------------------------------------------------------------------------------------------------
PHPCBF CAN FIX THE 4 MARKED SNIFF VIOLATIONS AUTOMATICALLY
------------------------------------------------------------------------------------------------------------------------------------
FILE: .../optional_end_month_year_range/src/Plugin/Field/FieldFormatter/OptionalEndMonthYearRangeDefaultFormatter.php
-------------------------------------------------------------------------------------------------------------------------------------------------
FOUND 1 ERROR AFFECTING 1 LINE
-------------------------------------------------------------------------------------------------------------------------------------------------
9 | ERROR | [x] Doc comment short description must end with a full stop
-------------------------------------------------------------------------------------------------------------------------------------------------
PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
-------------------------------------------------------------------------------------------------------------------------------------------------
FILE: .../optional_end_month_year_range/src/Plugin/Field/FieldFormatter/OptionalEndMonthYearRangeCustomFormatter.php
------------------------------------------------------------------------------------------------------------------------------------------------
FOUND 1 ERROR AFFECTING 1 LINE
------------------------------------------------------------------------------------------------------------------------------------------------
9 | ERROR | [x] Doc comment short description must end with a full stop
------------------------------------------------------------------------------------------------------------------------------------------------
PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY