don't remove newline from end of file

[simonLeary42]

I might be showing my ignorance, but I was under the assumption that all plain text files should end in a newline, per the posix definition of a file. Why does yamlfmt remove them? How can I tell yamlfmt to not do that?

[braydonk]

Hi @simonLeary42 thanks for opening an issue.

This is an issue in the yaml parsing library, which will not retain any newline information in its AST representation. I've tried to fix it but haven't been successful so far.

To keep the newlines at the ends of files, please use the retain_line_breaks configuration option. See https://github.com/google/yamlfmt/blob/main/docs/config-file.md#basic-formatter for more info.

I'll try adding a convenience hack that will add the linebreak back in if retain_line_breaks is turned off.