Apply Drupal Coding standards in CalculatorTest

FILE: ...or/drupal/pareviewsh/pareview_temp/tests/src/Unit/CalculatorTest.php
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FOUND 16 ERRORS AND 1 WARNING AFFECTING 17 LINES
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 19 | ERROR   | [ ] Doc comment short description must be on a single
    |         |     line, further text should be a separate paragraph
 34 | ERROR   | [x] Missing function doc comment
 36 | ERROR   | [x] Expected one space after the comma, 0 found
 37 | ERROR   | [x] Expected one space after the comma, 0 found
 38 | ERROR   | [x] Expected one space after the comma, 0 found
 39 | ERROR   | [x] Expected one space after the comma, 0 found
 40 | ERROR   | [x] Expected one space after the comma, 0 found
 53 | ERROR   | [x] Missing function doc comment
 55 | ERROR   | [x] Expected one space after the comma, 0 found
 56 | ERROR   | [x] Expected one space after the comma, 0 found
 57 | ERROR   | [x] Expected one space after the comma, 0 found
 58 | ERROR   | [x] Expected one space after the comma, 0 found
 59 | ERROR   | [x] Expected one space after the comma, 0 found
 64 | WARNING | [ ] Line exceeds 80 characters; contains 103 characters
 65 | ERROR   | [ ] Doc comment short description must be on a single
    |         |     line, further text should be a separate paragraph
 69 | ERROR   | [x] Expected 1 blank line after function; 0 found
 70 | ERROR   | [x] The closing brace for the class must have an empty
    |         |     line before it
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