code: function stripProjectRoot (projectRoot, filePath) {
    if (typeof filePath === 'string') {
      // Check whether the path is an posix absolute file, otherwise check whether it's a
      // win32 valid absolute file. The order is important here because win32 treats posix
      // absolute paths as absolute, but posix doesn't do the same for win32.
      const p = path.posix.isAbsolute(filePath) ? path.posix
        : path.win32.isAbsolute(filePath) ? path.win32
          : null
      if (p) {
        const relative = p.relative(projectRoot, filePath)
        if (relative.indexOf('.') !== 0) {
          return relative
        }
      }
    }
    return filePath
  }
docs: Strips the project root from the file path.
  
  @param {string} projectRoot The project root path
  @param {string} filePath The file path
  @returns {string}