Fix coding standard related errors

When running the module code against Drupal coding standards based on Drupal standard, the module shows errors

phpcs -s --standard=Drupal sites/default/modules/display_field_copy/

FILE: ...dules/display_field_copy/src/Plugin/DsField/DisplayFieldCopy.php
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FOUND 7 ERRORS AFFECTING 6 LINES
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 61 | ERROR | [x] The first parameter of a multi-line function
    |       |     declaration must be on the line after the opening
    |       |     bracket
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.FirstParamSpacing)
 62 | ERROR | [x] Multi-line function declaration not indented correctly;
    |       |     expected 6 spaces but found 30
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.Indent)
 63 | ERROR | [x] Multi-line function declaration not indented correctly;
    |       |     expected 6 spaces but found 30
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.Indent)
 64 | ERROR | [x] Multi-line function declaration not indented correctly;
    |       |     expected 6 spaces but found 30
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.Indent)
 65 | ERROR | [x] Multi-line function declaration not indented correctly;
    |       |     expected 6 spaces but found 30
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.Indent)
 66 | ERROR | [x] Multi-line function declaration not indented correctly;
    |       |     expected 6 spaces but found 30
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.Indent)
 66 | ERROR | [x] The closing parenthesis of a multi-line function
    |       |     declaration must be on a new line
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.CloseBracketLine)
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PHPCBF CAN FIX THE 7 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: ...ult/modules/display_field_copy/src/Form/DisplayFieldCopyForm.php
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FOUND 7 ERRORS AFFECTING 6 LINES
----------------------------------------------------------------------
 45 | ERROR | [x] The first parameter of a multi-line function
    |       |     declaration must be on the line after the opening
    |       |     bracket
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.FirstParamSpacing)
 46 | ERROR | [x] Multi-line function declaration not indented correctly;
    |       |     expected 6 spaces but found 30
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.Indent)
 47 | ERROR | [x] Multi-line function declaration not indented correctly;
    |       |     expected 6 spaces but found 30
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.Indent)
 48 | ERROR | [x] Multi-line function declaration not indented correctly;
    |       |     expected 6 spaces but found 30
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.Indent)
 49 | ERROR | [x] Multi-line function declaration not indented correctly;
    |       |     expected 6 spaces but found 30
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.Indent)
 50 | ERROR | [x] Multi-line function declaration not indented correctly;
    |       |     expected 6 spaces but found 30
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.Indent)
 50 | ERROR | [x] The closing parenthesis of a multi-line function
    |       |     declaration must be on a new line
    |       |     (Squiz.Functions.MultiLineFunctionDeclaration.CloseBracketLine)
----------------------------------------------------------------------
PHPCBF CAN FIX THE 7 MARKED SNIFF VIOLATIONS AUTOMATICALLY
----------------------------------------------------------------------

Time: 82ms; Memory: 6Mb