Coding standard review

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FOUND 1 ERROR AFFECTING 1 LINE
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 17 | ERROR | [x] Doc comment long description must end with a full
    |       |     stop
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FILE: ...saction_workflow/src/Form/TransactionWorkflowTransitionsForm.php
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FOUND 2 ERRORS AFFECTING 2 LINES
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 39 | ERROR | [x] Array indentation error, expected 8 spaces but
    |       |     found 10
 40 | ERROR | [x] Array indentation error, expected 8 spaces but
    |       |     found 10
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FILE: ...ansaction_workflow/src/Plugin/Transaction/WorkflowTransactor.php
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FOUND 2 ERRORS AND 2 WARNINGS AFFECTING 4 LINES
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 203 | ERROR   | [x] Whitespace found at end of line
 230 | ERROR   | [x] Array indentation error, expected 6 spaces but
     |         |     found 8
 304 | WARNING | [ ] Line exceeds 80 characters; contains 82
     |         |     characters
 322 | WARNING | [x] A comma should follow the last multiline array
     |         |     item. Found: NULL
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FILE: ...ction_workflow/src/Plugin/Block/TransactionWorkflowFormBlock.php
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FOUND 3 ERRORS AND 3 WARNINGS AFFECTING 5 LINES
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  16 | WARNING | [x] Unused use statement
  17 | WARNING | [x] Unused use statement
 149 | ERROR   | [x] Inline comments must start with a capital letter
 149 | ERROR   | [x] Inline comments must end in full-stops,
     |         |     exclamation marks, colons, question marks, or
     |         |     closing parentheses
 158 | ERROR   | [ ] There must be no space between ? and :
 238 | WARNING | [x] A comma should follow the last multiline array
     |         |     item. Found: ]
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FILE: ...transaction_workflow/src/TransactionWorkflowServiceInterface.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 18 | ERROR | [x] Expected "string|false" but found "string|FALSE"
    |       |     for function return type
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FILE: ...modules/contrib/transaction_workflow/transaction_workflow.module
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FOUND 2 ERRORS AND 1 WARNING AFFECTING 3 LINES
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  1 | ERROR   | [x] Missing file doc comment
 30 | WARNING | [ ] Line exceeds 80 characters; contains 82
    |         |     characters
 42 | ERROR   | [ ] There must be no space between ? and :