Fixed bug #636: Copy'n Paste-error in the definition of range restriction,

  S<->T is an abbreviation for POW(S**T), not POW(S<->T).


git-svn-id: svn://svn.code.sf.net/p/rodin-b-sharp/svn/trunk/Handbook@15847 1434b563-b632-4741-aa49-43a3a8374d2e