Variables to contorl help formatting do not always work

```
Setting these variables:

getopt.HelpColumn = 25
getopt.SetParameters("")

Only take effect when you manually bring out the usage with:
getopt.Usage()

They do not seem to have any impact when the Usage is displayed due to an error 
or a missing argument to a parameter  
```

Original issue reported on code.google.com by `jordan2...@gmail.com` on 9 Dec 2014 at 3:57
