Add option to highlight white space changes

[saiwing-yeung]

Is your feature request related to a problem? Please describe.

I can't tell what is changed when the changes in a line is white space only (adding or removing).

Describe the solution you'd like

Show a colored block. Like git -c diff.wsErrorHighlight=all diff.

Would be great if I can also set this as default.

Describe alternatives you've considered

I am aware of the ctrl-w option. But I'd like to see the diff.

Thank you for considering!

[mark2185]

Would be great if I can also set this as default.

Have you tried setting diff.wsErrorHighlight in your gitconfig?

I.e. git config --global diff.wsErrorHighlight=all

[saiwing-yeung]

Oh! That does it. Thanks! Closing.

[stefanhaller]

Just for my curiosity, we are talking about trailing whitespace here, is that right? Or are there other kinds of whitespace changes that you want to see?

In addition to what Luka said, I recommend to use a custom pager such as delta. Most pagers that I know will highlight trailing whitespace by default, in addition to the other useful highlighting they do. Personally I wouldn't want to work without delta's highlighting of intra-line changes.