Change element traversal to use an XPath query

This allows for JUnit files that are arrays of testsuites.

The originally supported single testsuite per file still works.

Author: martinbaillie

ruby/bin/annotate

@@ -26,7 +26,7 @@ junit_report_files.each do |file|
   xml = File.read(file)
   doc = REXML::Document.new(xml)
 
-  doc.elements.each('*/testcase') do |testcase|
+  REXML::XPath.each(doc, '//testsuite//testcase') do |testcase|
     name = testcase.attributes['name'].to_s
     classname = testcase.attributes['classname'].to_s
     testcase.elements.each("failure") do |failure|
@@ -66,4 +66,4 @@ failures.each do |failure|
   end
   puts "</details>"
   puts "" unless failure == failures.last
-end
+end