makefile formatting target failing

[SPlanzer]

Bug Description

Using the formatting make commands for trailing whitespace I added yesterday it is clear they were not correctly tested.

https://github.com/linz/gazetteer/blob/ec7caa01bf19aa49521c1c93acf3355954819d8c/Makefile#L45-L51

What runs in bash is failing via make.

Steps to Reproduce

running the below make targets

• make formatting-validate-trailing-whitespace
• make formatting-clean-trailing-whitespace

they throw make: *** [formatting-validate-trailing-whitespace] Error 1

This does not affect black targets

Desktop

Ubuntu 18

Screenshots

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[SPlanzer]

This is as grep doesn't give an error in bash, but it does return a non-zero exit code:

https://stackoverflow.com/questions/4761728/grep-this-foo-txt-this-txt-gives-an-error-in-makefile-not-in-bash-when-gre

will follow above advice and add || true

[SPlanzer]

also found that find . ! -name '*.git' ! -name '*.png' -type f is not ignore git

and am now using find . -type f -not -path "*\.git/*" -not -name "*\.png"