Fix the issues reported by phpcs [#3373069]

Problem/Motivation

FILE: /var/www/html/vb/d_cont/copy_formatter/copy_formatter.module
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FOUND 6 ERRORS AFFECTING 6 LINES
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3 | ERROR | Missing short description in doc comment
17 | ERROR | String concat is not required here; use a single string instead
19 | ERROR | String concat is not required here; use a single string instead
20 | ERROR | String concat is not required here; use a single string instead
21 | ERROR | String concat is not required here; use a single string instead
24 | ERROR | String concat is not required here; use a single string instead
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FILE: /var/www/html/vb/d_cont/copy_formatter/README.md
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FOUND 1 ERROR AND 4 WARNINGS AFFECTING 4 LINES
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3 | WARNING | [ ] Line exceeds 80 characters; contains 334 characters
29 | WARNING | [ ] Line exceeds 80 characters; contains 142 characters
32 | WARNING | [ ] Line exceeds 80 characters; contains 167 characters
33 | WARNING | [ ] Line exceeds 80 characters; contains 98 characters
33 | ERROR | [x] Expected 1 newline at end of file; 2 found
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: ..._formatter/src/Plugin/Field/FieldFormatter/CopyMediaEmbedCodeFormatter.php
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FOUND 0 ERRORS AND 1 WARNINGS AFFECTING 1 LINE
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12 | WARNING | Line exceeds 80 characters; contains 82 characters
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FILE: /var/www/html/vb/d_cont/copy_formatter/copy_formatter.info.yml
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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7 | WARNING | All dependencies must be prefixed with the project name, for
| | example "drupal:"
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Time: 69ms; Memory: 10MB

Steps to reproduce

Execute the command: phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml,twig copy_formatter/