def METHOD_NAME():
    METHOD_NAME  = '\n'
    METHOD_NAME += '  UpdateSpec_211-220 Usage:\n'
    METHOD_NAME += '    python UpdateSpec_211-220.py oldfile.xml (newfile.xml)\n'
    METHOD_NAME += '\n'
    METHOD_NAME += '  UpdateSpec_211-220:\n'
    METHOD_NAME += '    - reads a 2.1.1 amanzi input file and updates it to comform to the 2.2.0 input schema\n'
    METHOD_NAME += '    - if the optional argument newfile.xml is not specified, the updated xml will be written out to the oldfile.xml specified\n'
    METHOD_NAME += '    - it is recommended not to overwrite the oldfile.xml so that updates can be compared\n'
    METHOD_NAME += '    - to compare the old and new files use: diff -Eb or diff -w \n'
    METHOD_NAME += '\n'
    return METHOD_NAME