Doxygen comments in the form //! don't seem to work correctly. When typing the comment with word wrap enabled, wrapping to the next line not only fails to put the ! at the beginning of the line, it also fails to place a space after it, as shown:
//! I'm typing a Doxygen comment and the word wrap
//feature does this.
If an attempt is made to add the ! and space manually, SE will add the ! to the end of the previous line (if there's room), as shown:
//! I'm typing a Doxygen comment and the word wrap !
//feature does this.
In order to get around this, the comment must be typed in its entirety and then the !s must be added using column insert mode. After that, the comment may be edited and SE works correctly moving the words around between lines and leaving the !s in the proper places.