discourse/app/assets/javascripts/discourse/templates/modal/history.hbs

<div class="modal-body">
  <div>
    <div id="revision-controls">
      <button title="{{i18n post.revisions.controls.first}}" {{bind-attr class=":btn :standard :no-text displayGoToFirst::invisible" disabled=loading}} {{action "loadFirstVersion"}}><i class="fa fa-fast-backward"></i></button>
      <button title="{{i18n post.revisions.controls.previous}}" {{bind-attr class=":btn :standard :no-text displayGoToPrevious::invisible" disabled=loading}} {{action "loadPreviousVersion"}}><i class="fa fa-backward"></i></button>
      <div id="revision-numbers" {{bind-attr class="displayRevisions::invisible"}}>
        {{#if loading}}
          <div id='revision-loading'><i class='fa fa-spinner fa-spin'></i>{{i18n loading}}</div>
        {{else}}
          {{boundI18n revisionsTextKey previousBinding="previousVersion" currentBinding="current_version" totalBinding="version_count"}}
        {{/if}}
      </div>
      <button title="{{i18n post.revisions.controls.next}}" {{bind-attr class=":btn :standard :no-text displayGoToNext::invisible" disabled=loading}} {{action "loadNextVersion"}}><i class="fa fa-forward"></i></button>
      <button title="{{i18n post.revisions.controls.last}}" {{bind-attr class=":btn :standard :no-text displayGoToLast::invisible" disabled=loading}} {{action "loadLastVersion"}}><i class="fa fa-fast-forward"></i></button>
      {{#if displayHide}}
        <button title="{{i18n post.revisions.controls.hide}}" {{bind-attr class=":btn :standard :no-text :btn-danger" disabled=loading}} {{action "hideVersion"}}><i class="fa fa-trash-o"></i></button>
      {{/if}}
      {{#if displayShow}}
        <button title="{{i18n post.revisions.controls.show}}" {{bind-attr class=":btn :standard :no-text" disabled=loading}} {{action "showVersion"}}><i class="fa fa-undo"></i></button>
      {{/if}}
    </div>
    <div id="display-modes">
      <button {{bind-attr class=":btn displayingInline:btn-primary:standard"}} title="{{i18n post.revisions.displays.inline.title}}" {{action "displayInline"}}>{{{i18n post.revisions.displays.inline.button}}}</button>
      {{#unless site.mobileView}}
        <button {{bind-attr class=":btn displayingSideBySide:btn-primary:standard"}} title="{{i18n post.revisions.displays.side_by_side.title}}" {{action "displaySideBySide"}}>{{{i18n post.revisions.displays.side_by_side.button}}}</button>
        <button {{bind-attr class=":btn displayingSideBySideMarkdown:btn-primary:standard"}} title="{{i18n post.revisions.displays.side_by_side_markdown.title}}" {{action "displaySideBySideMarkdown"}}>{{{i18n post.revisions.displays.side_by_side_markdown.button}}}</button>
      {{/unless}}
    </div>
  </div>
  <div id="revision-details">
    {{i18n post.revisions.details.edited_by}}
    {{#link-to 'user' username}}
      {{bound-avatar-template content.avatar_template "small"}} {{username}}
    {{/link-to}}
    <span class="date">{{bound-date created_at}}</span>
    {{#if edit_reason}}
      &mdash; <span class="edit-reason">{{edit_reason}}</span>
    {{/if}}
    {{#unless site.mobileView}}
      {{#if user_changes}}
        &mdash; {{bound-avatar-template user_changes.previous.avatar_template "small"}} {{user_changes.previous.username}}
        &rarr; {{bound-avatar-template user_changes.current.avatar_template "small"}} {{user_changes.current.username}}
      {{/if}}
      {{#if wiki_changes}}
        &mdash; {{{wiki_diff}}}
      {{/if}}
      {{#if post_type_changes}}
        &mdash; {{{post_type_diff}}}
      {{/if}}
      {{#if category_changes}}
        &mdash; {{{previousCategory}}} &rarr; {{{currentCategory}}}
      {{/if}}
    {{/unless}}
  </div>
  <div id="revisions" {{bind-attr class="hiddenClasses"}}>
    {{#if title_changes}}
      <div class="row">
        <h2>{{{title_diff}}}</h2>
      </div>
    {{/if}}
    {{#if site.mobileView}}
      {{#if user_changes}}
        <div class="row">
          {{bound-avatar-template user_changes.previous.avatar_template "small"}} {{user_changes.previous.username}}
          &rarr; {{bound-avatar-template user_changes.current.avatar_template "small"}} {{user_changes.current.username}}
        </div>
      {{/if}}
      {{#if wiki_changes}}
        <div class="row">
          {{{wiki_diff}}}
        </div>
      {{/if}}
      {{#if post_type_changes}}
        <div class="row">
          {{{post_type_diff}}}
        </div>
      {{/if}}
      {{#if category_changes}}
        <div class="row">
          {{{previousCategory}}} &rarr; {{{currentCategory}}}
        </div>
      {{/if}}
    {{/if}}
    <div class="row">
      {{{body_diff}}}
    </div>
  </div>
</div>