Derivatives of sums do not always display correctly in notebook
  
  While expressions of the type \nabla_{f}{a_{c} d+b_{c}} print correctly,
the ones without explicit derivative index, \nabla{a_{c} d+b_{c}}, fail
to print brackets.
   
Details
  
    
      | Id: | 9c8f132023a13bdea10ef87e26d37d681705a8d1 | 
    
      | Type: | bugfix | 
    
      | Creation time: | 2009-09-02 19:08 GMT | 
    
      | Creator: | Kasper Peeters <kasper.peeters@...> | 
    
    
      | Release: | 1.17
          
            (released 2010-01-28) | 
    
      | Component: | cadabra | 
    
      | Status: | closed: fixed   | 
    
  
Issue log
  
  
    
      | 2010-01-20 21:26 GMT | Kasper Peeters <kasper.peeters@...> | closed with disposition fixed | 
    
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      | 2009-09-02 19:09 GMT | Kasper Peeters <kasper.peeters@...> | created | 
    
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