Semgrep file whitespace rules

.semgrep.yml

rules:
  - id: files-must-not-have-trailing-whitespace
    patterns:
      - pattern-regex: '[[:blank:]]$'
    message: Files must not have any trailing whitespace.
    languages: [generic]
    severity: ERROR
  - id: files-must-not-have-trailing-newlines
    patterns:
      - pattern-regex: '\n\n\Z'
    message: Files must not have any trailing newlines.
    languages: [generic]
    severity: ERROR
  - id: all-lines-must-end-with-newline
    patterns:
      - pattern-regex: '\S\z'
    message: All lines must end with newline.
    languages: [generic]
    severity: ERROR