fix comments

Author: djydewang

lib/pmdtester/parsers/pmd_report_document.rb

@@ -29,15 +29,20 @@ def start_element(name, attrs = [])
       case name
       when 'file'
         @current_violations = []
-        @current_filename = attrs['name'].sub(/^#{@working_dir}/, '')
+        @current_filename = remove_work_dir!(attrs['name'])
       when 'violation'
         @current_violation = PmdViolation.new(attrs, @branch_name)
       when 'error'
-        @current_filename = attrs['filename'].sub(/^#{@working_dir}/, '')
+        @current_filename = remove_work_dir!(attrs['filename'])
+        remove_work_dir!(attrs['msg'])
         @current_error = PmdError.new(attrs, @branch_name)
       end
     end
 
+    def remove_work_dir!(str)
+      str.sub!(/^#{@working_dir}/, '')
+    end
+
     def characters(string)
       @current_violation.text = string unless @current_violation.nil?
     end