git diff surrenders to new blocks having duplicate first or last lines

Question

I often have these kind of results when using git diff:

     /*
  +   * Newly added comment
  +   */
  +
  +
  +  /*
      * Old comment
      */

This is technically correct (since the first line did not change) but makes the later commit information hard to understand - especially when this happens with newly inserted functions:

  void function(bool param1,
  +    bool param2,
  +    bool param3)
  +{
  +    //Something else happens here
  +}
  +
  +void function(bool param1,
       bool param2)
   {
       //Something happens here
   }

Is there any possibility to give git diff a hint that a whole new block has been inserted, in order to receive:

  +void function(bool param1,
  +    bool param2,
  +    bool param3)
  +{
  +    //Something else happens here
  +}
  +
  void function(bool param1,
       bool param2)
   {
       //Something happens here
   }