Fix issues reported by PHPCS

Problem/Motivation

It would be great to address the below minor PHPCS issues :

phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml classy/

FILE: /var/www/web/themes/contrib/classy/classy.info.yml
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FOUND 0 ERRORS AND 3 WARNINGS AFFECTING 1 LINE
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 1 | WARNING | Remove "version" from the info file, it will be added by drupal.org packaging automatically
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FILE: /var/www/web/themes/contrib/classy/classy.theme
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FOUND 1 ERROR AFFECTING 1 LINE
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 58 | ERROR | Doc comment short description must be on a single line, further text should be a separate paragraph
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FILE: /var/www/web/themes/contrib/classy/css/components/progress.css
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FOUND 24 ERRORS AFFECTING 12 LINES
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 28 | ERROR | [ ] Style definition is empty
 28 | ERROR | [x] Expected 1 space after colon in style definition; newline found
 29 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 4
 29 | ERROR | [ ] No style definition found on line; check for missing colon
 30 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 4
 30 | ERROR | [ ] No style definition found on line; check for missing colon
 31 | ERROR | [ ] Style definition is empty
 31 | ERROR | [x] Expected 1 space after colon in style definition; newline found
 32 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 4
 32 | ERROR | [ ] No style definition found on line; check for missing colon
 33 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 4
 33 | ERROR | [ ] No style definition found on line; check for missing colon
 57 | ERROR | [x] Opening brace should be the last content on the line
 57 | ERROR | [x] Closing brace of class definition must be on new line
 58 | ERROR | [x] Opening brace should be the last content on the line
 58 | ERROR | [x] Closing brace of class definition must be on new line
 62 | ERROR | [x] Opening brace should be the last content on the line
 62 | ERROR | [x] Closing brace of class definition must be on new line
 63 | ERROR | [x] Opening brace should be the last content on the line
 63 | ERROR | [x] Closing brace of class definition must be on new line
 67 | ERROR | [x] Opening brace should be the last content on the line
 67 | ERROR | [x] Closing brace of class definition must be on new line
 68 | ERROR | [x] Opening brace should be the last content on the line
 68 | ERROR | [x] Closing brace of class definition must be on new line
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PHPCBF CAN FIX THE 18 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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Time: 271ms; Memory: 12MB

Steps to reproduce

Run the command,
phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml classy/

Proposed resolution

Fix the PHPCS issues.