{{ $diffBlock := (. | replaceRE "(?m:^```\\w+)" "```diff") }}
{{ $diffBlock := (index (split $diffBlock "```") 1) }}
{{ $diffBlock =  ($diffBlock | replaceRE "(?m:^([+\\-~])?.*$)" "$1") }}
{{ $diffBlock =  ($diffBlock | replaceRE "(?m:^$)" "." | replaceRE "\n" "") }}

{{ $lines := split $diffBlock "" }}

{{ $mainBlock :=  (. | replaceRE "(?m:^[+\\-~])" "") | markdownify }}

{{ range $i, $l := (split $mainBlock `class="line"`)}}
    {{ if gt $i 0}}
        class="line"
        {{ if eq (index $lines $i) "+" }}
        data-add="true"
        {{ end }}
        {{ if eq (index $lines $i) "-" }}
        data-remove="true"
        {{ end }}
        {{ if eq (index $lines $i) "~" }}
        data-highlight="true"
        {{ end }}
    {{ end }}
    {{$l | safeHTML}}
{{ end }}