Plain Jevko is a notch below JSON/XML/S-expr -- it's not really a format, but a syntax that can be leveraged to build a format.
This is where the rules for whitespace would be specified. These can then be taken advantage of by tools to reformat, etc.
The simplest format that I came up with and should specify next that will most likely do what you want is Easy Jevko. For details see this rabbit hole: https://news.ycombinator.com/item?id=33337098
For an alternative minimal syntax which is based around whitespace check out:
This is where the rules for whitespace would be specified. These can then be taken advantage of by tools to reformat, etc.
The simplest format that I came up with and should specify next that will most likely do what you want is Easy Jevko. For details see this rabbit hole: https://news.ycombinator.com/item?id=33337098
For an alternative minimal syntax which is based around whitespace check out:
* https://ogdl.org/
* https://treenotation.org/