Reformat gradle files with IntelliJ / .editorconfig

[dsmiley]

I told IntelliJ to reformat all gradle files. It uses the rules in our .editorconfig.
Also did a little hand-editing.

Once this is merged, I will record the commit in .git-blame-ignore-revs with a changelog entry with the title: Reformat gradle files with IntelliJ / .editorconfig

[dsmiley]

Unlike #4037 , there is no cost/time overhead (very high for "greclipse" !) or build complexity (however small) to maintain. True that there will be some inconsistency but we have a .editorconfig which should reduce that, especially amongst IntelliJ users. This is an improvement!