Fix diff alignment and remove no change DC

[dadgar]

Old Output:

+/- Job: "example"
    Datacenters {
  Datacenters: "dc1"
}
+/- Task Group: "cache" (1 create/destroy update)
  +/- RestartPolicy {
    +/- Attempts: "10" => "9"
        Delay:    "25000000000"
        Interval: "300000000000"
        Mode:     "delay"
  }
  +/- EphemeralDisk {
        Migrate: "false"
    +/- SizeMB:  "300" => "301"
        Sticky:  "false"
  }
  +/- Task: "redis" (forces create/destroy update)
    +   Meta[key]: "value"
    +/- Config {
          image:           "redis:3.2"
      +/- port_map[0][db]: "6379" => "6380"
    }
    +/- Resources {
          CPU:      "500"
          DiskMB:   "0"
          IOPS:     "0"
      +/- MemoryMB: "256" => "257"
    }
    +/- Service {
          Name:      "global-redis-check"
          PortLabel: "db"
      +/- Check {
            Command:       ""
            InitialStatus: ""
            Interval:      "10000000000"
            Name:          "alive"
            Path:          ""
            PortLabel:     ""
            Protocol:      ""
        +/- Timeout:       "2000000000" => "3000000000"
            Type:          "tcp"
      }
    }

New Output:

+/- Job: "example"
+/- Task Group: "cache" (1 create/destroy update)
  +/- RestartPolicy {
    +/- Attempts: "10" => "9"
        Delay:    "25000000000"
        Interval: "300000000000"
        Mode:     "delay"
      }
  +/- EphemeralDisk {
        Migrate: "false"
    +/- SizeMB:  "300" => "301"
        Sticky:  "false"
      }
  +/- Task: "redis" (forces create/destroy update)
    +   Meta[key]: "value"
    +/- Config {
          image:           "redis:3.2"
      +/- port_map[0][db]: "6379" => "6380"
        }
    +/- Resources {
          CPU:      "500"
          DiskMB:   "0"
          IOPS:     "0"
      +/- MemoryMB: "256" => "257"
        }
    +/- Service {
          Name:      "global-redis-check"
          PortLabel: "db"
      +/- Check {
            Command:       ""
            InitialStatus: ""
            Interval:      "10000000000"
            Name:          "alive"
            Path:          ""
            PortLabel:     ""
            Protocol:      ""
        +/- Timeout:       "2000000000" => "3000000000"
            Type:          "tcp"
          }
        }

[schmichael]

(once travis passes)

[github-actions]

I'm going to lock this pull request because it has been closed for 120 days ⏳. This helps our maintainers find and focus on the active contributions.
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