1.

   Note: the default parsing behavior is to expand tabs in the input string
   before starting the parsing process.  See L{I{ParserElement.parseString}<ParserElement.parseString>} for more information
   on parsing strings containing C{<TAB>}s, and suggested methods to maintain a
   consistent view of the parsed string, the parse location, and line and column
   positions within the parsed string.
   r2