Implement re-read-init-file

[ima1zumi]

I implemented re-read-init-file to reload .inputrc.

The default key bindings are not set because they can’t be configured in the current Reline. Given the low usage of inputrc, I believe it’s unnecessary to include them. This was mainly implemented for debugging.

I haven’t written tests for this since I’m unsure how to test inputrc changes. Any suggestions are welcome.

[tompng]

The code and the behavior looks good 👍
There are some differences between readline and reline's reload but I think reline's implementation is better. (readline does not reset before reload).

Test

How about adding to test_config.rb with reference to def test_inputrc

Write content to inputrc file in tmpdir, call @config.read and @config.reload, and then check variable (for example: @config.emacs_mode_string) specified in inputrc.

inputrc = "#{tmpdir}/inputrc"
ENV['INPUTRC'] = inputrc
File.write(inputrc, "old content")
@config.read
File.write(inputrc, "new content")
@config.reload
# test new value loaded, test old value not kept.

[ima1zumi]

Write content to inputrc file in tmpdir, call @config.read and @config.reload, and then check variable (for example: @config.emacs_mode_string) specified in inputrc.

Thank you! I added a test.

[tompng]

Looks good 👍