Re: [bug-diffutils] How to ignore blank lines?

[Sérgio Basto]

On Qua, 2013-01-30 at 16:30 -0600, Robert Wenner wrote: 
> Hello,
> 
> is this the right place to ask about how to use diff?
> If not please point me in the right direction.
> 
> 
> How can I get GNU diff ignore the blank lines in the following
> example?

yeah 

man diff 
       -B, --ignore-blank-lines ignore changes whose lines are all blank

but doesn't work ...

> 
> File a:
> --- cut here ---
> x
> do
> 
> done
> --- cut here ---
> 
> File b:
> --- cut here ---
> x
> 
> do
> done
> --- cut here ---
> 
> Neither file has trailing white spaces in any line.
> 
> Using GNU diff 3.1 on Mac OS X I get:
> 
> diff -w a b
> 2d1
> < do
> 3a3
>  > do
> 
> Same when I add various promising looking options:
> 
> diff --suppress-blank-empty -E -b -w -B -I '^[[:space:]]*$' 
> --strip-trailing-cr -i a b
> 2d1
> < do
> 3a3
>  > do
> 
> What am I missing here?
> 
> diff --version
> diff (GNU diffutils) 3.1
> 
> Thanks,
> 
> Robert
> 

-- 
Sérgio M. B.