Also spell out gitlab-rake for web hook tasks

doc/raketasks/web_hooks.md

@@ -2,26 +2,44 @@
 
 ## Add a web hook for **ALL** projects:
 
+    # omnibus-gitlab
+    sudo gitlab-rake gitlab:web_hook:add URL="http://example.com/hook"
+    # source installations or cookbook
     RAILS_ENV=production bundle exec rake gitlab:web_hook:add URL="http://example.com/hook"
 
 ## Add a web hook for projects in a given **NAMESPACE**:
 
+    # omnibus-gitlab
+    sudo gitlab-rake gitlab:web_hook:add URL="http://example.com/hook" NAMESPACE=acme
+    # source installations or cookbook
     RAILS_ENV=production bundle exec rake gitlab:web_hook:add URL="http://example.com/hook" NAMESPACE=acme
 
 ## Remove a web hook from **ALL** projects using:
 
+    # omnibus-gitlab
+    sudo gitlab-rake gitlab:web_hook:rm URL="http://example.com/hook"
+    # source installations or cookbook
     RAILS_ENV=production bundle exec rake gitlab:web_hook:rm URL="http://example.com/hook"
 
 ## Remove a web hook from projects in a given **NAMESPACE**:
 
+    # omnibus-gitlab
+    sudo gitlab-rake gitlab:web_hook:rm URL="http://example.com/hook" NAMESPACE=acme
+    # source installations or cookbook
     RAILS_ENV=production bundle exec rake gitlab:web_hook:rm URL="http://example.com/hook" NAMESPACE=acme
 
 ## List **ALL** web hooks:
 
+    # omnibus-gitlab
+    sudo gitlab-rake gitlab:web_hook:list
+    # source installations or cookbook
     RAILS_ENV=production bundle exec rake gitlab:web_hook:list
 
 ## List the web hooks from projects in a given **NAMESPACE**:
 
+    # omnibus-gitlab
+    sudo gitlab-rake gitlab:web_hook:list NAMESPACE=/
+    # source installations or cookbook
     RAILS_ENV=production bundle exec rake gitlab:web_hook:list NAMESPACE=/
 
 > Note: `/` is the global namespace.