filetype: diff

detect: 
    filename: "\\.diff$"
    header: "^((---.*)|(\\+\\+\\+.*))"

rules:
    - statement: "(^\\+\\+\\+.*)"
    - statement: "(^---.*)"
    - type: "(^@@.*)"
    - constant.number: "(^\\+.*)"
    - preproc: "(^-.*)"