Bug: diff-output not correct with -B (ignore empty lines) option ?

[sspamm2001-gguu]

I was using:
   
  diff -B -u3 -r src1 src2 > diff1.diff
   
  But later "patch" was complaining, and the reason was this line:
   
  @@ -627,6 +872,61 @@
...
+ [47 lines]
...
   
  i counted 47 lines with "+" (no with "-") and corrected it to:
   
  @@ -627,6 +872,53 @@
   
  ...and it was ok (6+47=53).
   
  Maybe the reason was the diff-option:
-B  --ignore-blank-lines  Ignore changes whose lines are all blank
  
my version: diff (GNU diffutils) 2.8.7 (from cygwin)
   
  Can you check this (maybe it is fixed already?)

                
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