make sync-default-gems GEM=irb

from e8e79d569e.

This colorizes Range object on IRB inspect.

lib/irb/color.rb

@@ -47,17 +47,17 @@ module IRB # :nodoc:
       end
 
       def inspect_colorable?(obj)
-        if obj.is_a?(Module) && obj.name
-          return true
-        end
-
         case obj
+        when String, Symbol, Regexp, Integer, Float, FalseClass, TrueClass, NilClass
+          true
         when Hash
           obj.all? { |k, v| inspect_colorable?(k) && inspect_colorable?(v) }
         when Array
           obj.all? { |o| inspect_colorable?(o) }
-        when String, Symbol, Regexp, Integer, Float, FalseClass, TrueClass, NilClass
-          true
+        when Range
+          inspect_colorable?(obj.begin) && inspect_colorable?(obj.end)
+        when Module
+          !obj.name.nil?
         else
           false
         end

test/irb/test_color.rb

@@ -44,6 +44,7 @@ module TestIRB
         ['foo', :bar] => true,
         { a: 4 } => true,
         /reg/ => true,
+        (1..3) => true,
         Object.new => false,
         Struct => true,
         Test => true,