Better example

CHANGELOG.md

@@ -5,7 +5,14 @@ CHANGELOG
 ------
 - Added `--with-shell` option to start child processes with a custom shell command and flags
   ```sh
-  gem list | fzf --with-shell 'ruby -e' --preview 'pp Gem::Specification.find_by_name({1})'
+  gem list | fzf --with-shell 'ruby -e' \
+    --preview 'pp Gem::Specification.find_by_name({1})' \
+    --bind 'ctrl-o:execute-silent:
+        spec = Gem::Specification.find_by_name({1})
+        [spec.homepage, *spec.metadata.filter { _1.end_with?("uri") }.values].uniq.each do
+          system "open", _1
+        end
+    '
   ```
 - Added `change-multi` action for dynamically changing `--multi` option
     - `change-multi` - enable multi-select mode with no limit