[Feature request] Support of advanced actions

[ohault]

Advances actions could be implemented on top of the existing one, thanks to the clean and great design of this tool.

Here are some proposals

• remove duplicate entries
• merge sections
• compact to merge sections and remove duplicate entries
• diff two INI files
• sync a section between two INI files
• ...

[dbohdan]

I don't plan to implement these features right now. I will keep the issue open as a list of ideas for me and any contributors.

[yaitskov]

add modify in place flag - stick to sed until then. these days everything serious is dockerized/nixified etc and there is no danger of concurrent access to dirty file.