fix comments to markdown format
@@ -509,21 +509,24 @@ func (p *Parser) parseIfExpression() ast.Expression {
// Case expression forms if statement when parsing it
//
-// ex.
+// ```ruby
// case 1
// when 0, 1
// '0 or 1'
// else
// 'else'
// end
+// ```
//
// is the same with if expression below
//
+// ```ruby
// if 1 == 0 || 1 == 1
// '0 or 1'
// else
// 'else'
// end
+// ```
//
// TODO Implement '===' method and replace '==' to '===' in Case expression
