number.rb in gem-release-2.2.0

- old
+ new

@@ -1,10 +1,11 @@
 module Gem
   module Release
     module Version
       class Number < Struct.new(:number, :target)
         NUMBER = /^(\d+)\.?(\d+)?\.?(\d+)?(\-|\.)?(\w+)?\.?(\d+)?$/
+        PRE_RELEASE  = /^(\d+)\.(\d+)\.(\d+)\.?(.*)(\d+)$/
 
         STAGES = %i(alpha beta pre rc)
 
         def bump
           return target if specific?
@@ -19,10 +20,10 @@
         end
 
         private
 
           def specific?
-            target =~ NUMBER
+            target =~ NUMBER || target =~ PRE_RELEASE
           end
 
           def major
             part = parts[0]
             part += 1 if to?(:major)