st: xml_tab adjustments

["Thomas Erdmann" <tom.erdmann@web.de>]

Hi - 

Using -xml_tab- from ssc with the options -below- and -pvalue- I have the
small issue that the pvalues are formatted as special figures in the .xml
file within brackets like: (0.01) 

Couldn't find a hint in the help file on this, is it possible to change
this?

Thanks in advance.

- Tom 

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