message: Fix quote characters to satisfy linter
diff: @@ -46,7 +46,7 @@ export class ScoreBoardComponent implements OnInit {
  public showChallengeHints: boolean = true
  public showHackingInstructor: boolean = true
  public challenges: Challenge[] = []
  - public percentChallengesSolved: string = "0"
  + public percentChallengesSolved: string = '0'
  public solvedChallengesOfDifficulty: Challenge[][] = [[], [], [], [], [], []]
  public totalChallengesOfDifficulty: Challenge[][] = [[], [], [], [], [], []]
  public showContributionInfoBox: boolean = true
  