Added entry about ext/readline

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Hiroshi SHIBATA 2023-05-10 09:56:54 +09:00
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@ -82,6 +82,11 @@ changelog for details of the default gems or bundled gems.
## Stdlib compatibility issues
### `ext/readline` is retired
* We have `reline` that is pure Ruby implementation compatible with `ext/readline` API. We rely on `reline` in the future. If you need to use `ext/readline`, you can install `ext/readline` via rubygems.org with `gem install readline-ext`.
* We no longer need to install libraries like `libreadline` or `libedit`.
## C API updates
## Implementation improvements