Updated documentation on cm_prtpScen switch that sets the pure rate of time preference

[dbantje]

Purpose of this PR

Just a small correction of the inline documentation for the switch cm_prtpScen which sets the pure rate of time preference. The description of the default option said "1%", but it is actually set to 1.5%:

(from core/datainput.gms)

*** define pm_prtp according to cm_prtpScen:
if(cm_prtpScen eq 1, pm_prtp(regi) = 0.015);
if(cm_prtpScen eq 3, pm_prtp(regi) = 0.03);

Type of change

(Make sure to delete from the Type-of-change list the items not relevant to your PR)

• Documentation fix

Checklist:

• My code follows the coding etiquette
• I performed a self-review of my own code
• I explained my changes within the PR, particularly in hard-to-understand areas
• I checked that the in-code documentation is up-to-date
• I adjusted the reporting in remind2 where it was needed (not needed)
• I adjusted forbiddenColumnNames in readCheckScenarioConfig.R in case the PR leads to deprecated switches (not needed)
• All automated model tests pass (FAIL 0 in the output of make test)

[LaviniaBaumstark]

I am confuesed...isn't it 1 in the line above?

[dbantje]

That had me confused too, but I think it is supposed to be just an index for the switch options. Because later it clearly says

*** define pm_prtp according to cm_prtpScen:
if(cm_prtpScen eq 1, pm_prtp(regi) = 0.015);
if(cm_prtpScen eq 3, pm_prtp(regi) = 0.03);

But I guess we could also just make this switch into a numerical one, so the switch value actually corresponds to the value of the pure rate of time preference. That would also a nice feature if one wants to vary the rate.

[LaviniaBaumstark]

ah, thanks. Let's keep it as is