This is a ruby program to output single-lined XML found in standard 
input to standard output.

Accepts an optional element name to match on the command line, 
ignoring namespaces.

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Examples:

tail -f server.log | ruby pp_xml.rb

or 

tail -f server.log | ruby pp_xml.rb Soap
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Improvements:

1. accept an optional file name -f=myfile.log
2. accept a regular expression for element name to match
3. match a multi-line xml file
4. split xml output from search/cmd line