[ruby/reline] ensure reline's encoding is used when reading inputrc character values

This change ensures we use `Reline::IOGate`'s `encoding` when converting
characters from their integer values.

This fixes an issue that may occur if you have UTF characters in your
`.inputrc`, but your default encoding isn't set.

For example:

```
> 127864.ord.chr
RangeError: 127864 out of char range
from (pry):1:in `chr'
> Reline::IOGate.encoding
=> #<Encoding:UTF-8>
> 127864.ord.chr(Reline::IOGate.encoding)
=> "🍸"
```

https://github.com/ruby/reline/commit/cf372fc0fc

1 files changed, 2 insertions, 5 deletions

diff --git a/lib/reline/config.rb b/lib/reline/config.rb
index 9689c8f51d..dd81a23ea7 100644
--- a/lib/reline/config.rb
+++ b/lib/reline/config.rb
@@ -292,11 +292,8 @@ class Reline::Config
   end
 
   def retrieve_string(str)
-    if str =~ /\A"(.*)"\z/
-      parse_keyseq($1).map(&:chr).join
-    else
-      parse_keyseq(str).map(&:chr).join
-    end
+    str = $1 if str =~ /\A"(.*)"\z/
+    parse_keyseq(str).map { |c| c.chr(Reline::IOGate.encoding) }.join
   end
 
   def bind_key(key, func_name)