Diff Markdown Should Have Colour Highlighting for Indented Created/Removed items

[murrelljenna]

Current diff format doesn't work well with most markdown highlighters (including GitHub's). Indented +s and -s do not receive colour highlighting.

Using Atlantis v0.16.0.

Actual results

Current v0.16.0.

An execution plan has been generated and is shown below.
Resource actions are indicated with the following symbols:
+ create
~ update in-place

Terraform will perform the following actions:

  # google_compute_instance.computer will be updated in-place
~ resource "google_compute_instance" "computer" {
        allow_stopping_for_update = true
        can_ip_forward            = false
        cpu_platform              = "Intel Skylake"
        current_status            = "RUNNING"
        deletion_protection       = false
        enable_display            = false
        guest_accelerator         = []
        id                        = "projects/skynet/zones/northamerica-northeast1-a/instances/computer"
        instance_id               = "..."
        label_fingerprint         = "..."
        labels                    = {}
        machine_type              = "n1-standard-1"
      ~ metadata                  = {
            "block-project-ssh-keys" = "true"
          - "ssh-keys"               = "ubuntu:ssh-rsa AAAAB..." -> null
        }
        

Expected results

Preferred with better colouring

An execution plan has been generated and is shown below.
Resource actions are indicated with the following symbols:
+ create
- remove
~ update in-place

Terraform will perform the following actions:

  # google_compute_instance.computer will be updated in-place
~ resource "google_compute_instance" "computer" {
        allow_stopping_for_update = true
        can_ip_forward            = false
        cpu_platform              = "Intel Skylake"
        current_status            = "RUNNING"
        deletion_protection       = false
        enable_display            = false
        guest_accelerator         = []
        id                        = "projects/skynet/zones/northamerica-northeast1-a/instances/computer"
        instance_id               = "..."
        label_fingerprint         = "..."
        labels                    = {}
        machine_type              = "n1-standard-1"
      ~ metadata                  = {
            "block-project-ssh-keys" = "true"
-           "ssh-keys"               = "ubuntu:ssh-rsa AAAAB..." -> null
        }