add profile option for edit history, visible only when edit history is disabled globally.

app/assets/javascripts/discourse/templates/user/preferences.js.handlebars

@@ -167,6 +167,9 @@
       {{preference-checkbox labelKey="user.enable_quoting" checked=enable_quoting}}
       {{preference-checkbox labelKey="user.dynamic_favicon" checked=dynamic_favicon}}
       {{preference-checkbox labelKey="user.disable_jump_reply" checked=disable_jump_reply}}
+      {{#if !Discourse.SiteSettings.edit_history_available_to_public}}
+        {{preference-checkbox labelKey="user.edit_history_public" checked=edit_history_public}}
+      {{/if}}
       {{plugin-outlet "user_custom_preferences"}}
     </div>
 

app/models/user.rb

@@ -774,6 +774,7 @@ end
 #  registration_ip_address       :inet
 #  last_redirected_to_top_at     :datetime
 #  disable_jump_reply            :boolean          default(FALSE), not null
+#  edit_history_public           :boolean          default(FALSE), not null
 #
 # Indexes
 #

app/serializers/user_serializer.rb

@@ -77,7 +77,8 @@ class UserSerializer < BasicUserSerializer
                      :gravatar_avatar_upload_id,
                      :custom_avatar_upload_id,
                      :custom_fields,
-                     :has_title_badges
+                     :has_title_badges,
+                     :edit_history_public
 
   ###
   ### ATTRIBUTES

app/services/user_updater.rb

@@ -15,7 +15,8 @@ class UserUpdater
       :enable_quoting,
       :dynamic_favicon,
       :mailing_list_mode,
-      :disable_jump_reply
+      :disable_jump_reply,
+      :edit_history_public
   ]
 
   PROFILE_ATTR = [

config/locales/client.en.yml

@@ -271,6 +271,7 @@ en:
       notifications: "Notifications"
       disable_jump_reply: "Don't jump to your new post after replying"
       dynamic_favicon: "Show incoming message notifications on favicon (experimental)"
+      edit_history_public: "Let other users view my post revisions"
       external_links_in_new_tab: "Open all external links in a new tab"
       enable_quoting: "Enable quote reply for highlighted text"
       change: "change"

db/migrate/20140727030954_add_edit_history_public_to_users.rb

@@ -0,0 +1,5 @@
+class AddEditHistoryPublicToUsers < ActiveRecord::Migration
+  def change
+    add_column :users, :edit_history_public, :boolean, default: false, null: false
+  end
+end

lib/guardian/post_guardian.rb

@@ -137,7 +137,7 @@ module PostGuardian
     return false unless post
 
     if !post.hidden
-      return true if post.wiki || SiteSetting.edit_history_visible_to_public
+      return true if post.wiki || SiteSetting.edit_history_visible_to_public || post.user.edit_history_public
     end
 
     authenticated? &&