isblank() is not available so use isspace() instead
Print useful info on undefined-function error.
New user variable GPVAL_LAST_FIT
Zero-change in chisquare is BETTER, not WORSE.
Do not try to dereference NULL result from strchr().
Discard data which contains NaN
comment out unused routines
Missing include for MSVC
Print the p-value of a fit.
set fit script
set fit script
Cleanup declarations
Restore encoding