Comet parameter: print_expect_score
         
         - A boolean flag this determines whether or not the expectation
         score (E-value) is reported in .out and SQT formats.  Note that the
         E-value is always reported in pepXML output.
         
- This parameter is only pertinant for results reported in .out and SQT formats.
         
- If expect scores are chosen to be reported (i.e. value set to 1), they will replace
         the number reported for the traditional "spscore" i.e. "spscore" will
         be replaced by an E-value.  Also an expectation value histogram will
         be output at the end of each .out file; this histogram is not present
         for SQT output.
         
- Valid values are 0 and 1.
         
- The default value is "0" if this parameter is missing.
         
Example:
         
print_expect_score = 0
         
print_expect_score = 1