Fix issues reported by phpcs

I run this following phpcs command and errors were reported below.

./vendor/bin/phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml,twig /home/valuelabs/projects/newone/web/modules/radix_layouts

FILE: ...home/valuelabs/projects/newone/web/modules/radix_layouts/radix_layouts.css
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FOUND 20 ERRORS AFFECTING 20 LINES
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16 | ERROR | [x] Blank lines are not allowed in class definitions
18 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 5
19 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 10
23 | ERROR | [x] Selectors must be on a single line
25 | ERROR | [x] Selectors must be on a single line
27 | ERROR | [x] Selectors must be on a single line
29 | ERROR | [x] Selectors must be on a single line
31 | ERROR | [x] Selectors must be on a single line
36 | ERROR | [x] Blank lines are not allowed in class definitions
38 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 5
39 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 10
100 | ERROR | [x] Blank lines are not allowed in class definitions
102 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 5
103 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 10
110 | ERROR | [x] Blank lines are not allowed in class definitions
112 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 5
113 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 10
206 | ERROR | [x] Blank lines are not allowed in class definitions
208 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 5
209 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 10
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PHPCBF CAN FIX THE 20 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /home/valuelabs/projects/newone/web/modules/radix_layouts/CHANGELOG.txt
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FOUND 1 ERROR AFFECTING 1 LINE
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16 | 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: /home/valuelabs/projects/newone/web/modules/radix_layouts/README.md
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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10 | WARNING | Line exceeds 80 characters; contains 122 characters
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FILE: ...e/valuelabs/projects/newone/web/modules/radix_layouts/radix_layouts.module
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FOUND 1 ERROR AFFECTING 1 LINE
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1 | ERROR | [x] The PHP open tag must be followed by exactly one blank line
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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