Reported by forum user at http://forum.unity3d.com/threads/highlighter-highlight-has-no-c-and-boo-code-samples.289250/

UnityEditor/Highlighter.mem.xml contains:

"<returns>/true/ if the requested element was found; otherwise /false/.</returns>"

On http://docs.unity3d.com/500/Documentation/ScriptReference/Highlighter.Highlight.html, this is outputted as:

"Returns
bool false if the requested element was found; otherwise false."

A (perhaps) similar example is UnityEngine/GUI.mem.xml, which contains "<returns>/true/ when the users clicks the button.</returns>", but output at (http://docs.unity3d.com/500/Documentation/ScriptReference/GUI.Button.html) is "bool /true/ when the users clicks the button." (note the slashes is kept)