get rid of newer syntax for old versions

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64751 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/mspec/lib/mspec/utils/script.rb

@@ -189,10 +189,11 @@ class MSpecScript
     end
 
     patterns.each do |pattern|
-      expanded = File.realpath(pattern)
-    rescue Errno::ENOENT
-      next
-    else
+      begin
+        expanded = File.realpath(pattern)
+      rescue Errno::ENOENT
+        next
+      end
       if File.file?(expanded) && expanded.end_with?('.rb')
         return [expanded]
       elsif File.directory?(expanded)