Minor tracer.rb patch

Hi,

Here's a patch that gets rid of the unnecessary (and occasionally problematic) 
MY_FILE_NAME constant, which I'm guessing was used for quick testing by the author:

--- tracer.orig Wed Feb 15 16:13:47 2006
+++ tracer.rb   Wed Feb 15 16:14:29 2006
@@ -24,8 +24,6 @@
      attr :stdout, true
    end

-  MY_FILE_NAME = caller(0)[0].scan(/^(.*):[0-9]+$/)[0][0]
-
    EVENT_SYMBOL = {
      "line" => "-",
      "call" => ">",
@@ -113,7 +111,7 @@
    end

    def trace_func(event, file, line, id, binding, klass, *)
-    return if file == MY_FILE_NAME
+    return if file == __FILE__

      for p in @filters
        return unless p.call event, file, line, id, binding, klass
@@ -155,16 +153,3 @@
  end

  SCRIPT_LINES__ = {} unless defined? SCRIPT_LINES__
-
-if caller(0).size == 1
-  if $0 == Tracer::MY_FILE_NAME
-    # direct call
-
-    $0 = ARGV[0]
-    ARGV.shift
-    Tracer.on
-    require $0
-  else
-    Tracer.on
-  end
-end

Regards,

Dan