fix redmine checkout plugin for ruby 1.9.2

vendor/plugins/redmine_checkout/lib/checkout/protocol.rb

@@ -71,14 +71,14 @@ module Checkout
         @access
       end
     end
-    
+
     def access_label(user)
       case access_rw(user)
-        when 'read+write': :label_access_read_write
-        when 'read-only': :label_access_read_only
+      when 'read+write' then :label_access_read_write
+      when 'read-only'  then :label_access_read_only
       end
     end
-  
+
     def fixed_url
       @fixed_url.present? ? @fixed_url : begin
         if (regex.blank? || regex_replacement.blank?)
@@ -93,7 +93,7 @@ module Checkout
 
     def url(path = "")
       return "" unless repository
-      
+
       url = fixed_url.sub(/\/+$/, "")
       if repository.allow_subtree_checkout? && self.append_path? && path.present?
         url = "#{url}/#{path}"
@@ -115,4 +115,4 @@ module Checkout
       url
     end
   end
-end
\ No newline at end of file
+end