compare.rb in benchmark_driver-0.14.4

- old
+ new

@@ -114,13 +114,15 @@
   ensure
     $stdout.sync = sync
   end
 
   def humanize(value, width = 10)
-    if value == BenchmarkDriver::Result::ERROR
+    if BenchmarkDriver::Result::ERROR.equal?(value)
       return " %#{width}s" % 'ERROR'
+    elsif value == 0.0
+      return " %#{width}.3f" % 0.0
     elsif value < 0
-      raise ArgumentError.new("Non positive value: #{value.inspect}")
+      raise ArgumentError.new("Negative value: #{value.inspect}")
     end
 
     scale = (Math.log10(value) / 3).to_i
     return "%#{width}s" % value.to_s if scale < 0 # like 1.23e-04
 