Crossed Double Bond

• Checker searches for crossed double bond types (molecules with unknown or unspecified configuration).

• Fixer offers changing crossed double bond to wiggly double bond type (converttowigglydoublebond).

  Example :

  Crossed Double Bond Checker (crosseddoublebond)	Warning:	Fix
  		Convert to Wiggly Double Bond (converttowigglydoublebond)
  Detect crossed double bond	ex_crossed_ch	ex_crossed_f

  Note : Reverse action is: Wiggly Double Bond Checker.