ruby: update page (#17914)

pages/common/ruby.md

@@ -6,15 +6,15 @@
 
 - Execute a Ruby script:
 
-`ruby {{script.rb}}`
+`ruby {{path/to/script.rb}}`
 
 - Execute a single Ruby command in the command-line:
 
-`ruby -e {{command}}`
+`ruby -e "{{command}}"`
 
 - Check for syntax errors on a given Ruby script:
 
-`ruby -c {{script.rb}}`
+`ruby -c {{path/to/script.rb}}`
 
 - Start the built-in HTTP server on port 8080 in the current directory:
 
@@ -24,6 +24,6 @@
 
 `ruby -I {{path/to/library_folder}} -r {{library_require_name}} {{path/to/bin_folder/bin_name}}`
 
-- Display Ruby version:
+- Display version:
 
-`ruby -v`
+`ruby {{[-v|--version]}}`