py, modcmath: Fix doc comment, and add some more of them.
py, modcmath: Fix doc comment, and add some more of them.

skybird6672/micropython,ceramos/micropython,xhat/micropython,ericsnowcurrently/micropython,paul-xxx/micropython,chrisdearman/micropython,danicampora/micropython,ceramos/micropython,dinau/micropython,matthewelse/micropython,blazewicz/micropython,ahotam/micropython,mgyenik/micropython,henriknelson/micropython,redbear/micropython,adamkh/micropython,firstval/micropython,jlillest/micropython,tralamazza/micropython,jmarcelino/pycom-micropython,ericsnowcurrently/micropython,puuu/micropython,ahotam/micropython,mgyenik/micropython,xhat/micropython,cwyark/micropython,noahwilliamsson/micropython,torwag/micropython,drrk/micropython,tobbad/micropython,misterdanb/micropython,swegener/micropython,dinau/micropython,martinribelotta/micropython,AriZuu/micropython,aethaniel/micropython,SHA2017-badge/micropython-esp32,dhylands/micropython,tobbad/micropython,pramasoul/micropython,Timmenem/micropython,adafruit/circuitpython,blazewicz/micropython,warner83/micropython,adafruit/micropython,ericsnowcurrently/micropython,danicampora/micropython,suda/micropython,SHA2017-badge/micropython-esp32,danicampora/micropython,jmarcelino/pycom-micropython,TDAbboud/micropython,mhoffma/micropython,blmorris/micropython,ericsnowcurrently/micropython,alex-march/micropython,dhylands/micropython,deshipu/micropython,utopiaprince/micropython,martinribelotta/micropython,Timmenem/micropython,alex-robbins/micropython,paul-xxx/micropython,kostyll/micropython,vriera/micropython,cnoviello/micropython,vitiral/micropython,mpalomer/micropython,cnoviello/micropython,mhoffma/micropython,Peetz0r/micropython-esp32,jlillest/micropython,xyb/micropython,pfalcon/micropython,supergis/micropython,ruffy91/micropython,ryannathans/micropython,toolmacher/micropython,jlillest/micropython,SHA2017-badge/micropython-esp32,ernesto-g/micropython,dmazzella/micropython,Vogtinator/micropython,hiway/micropython,praemdonck/micropython,danicampora/micropython,warner83/micropython,kerneltask/micropython,selste/micropython,KISSMonX/micropython,SungEun-Steve-Kim/test-mp,alex-robbins/micropython,tralamazza/micropython,KISSMonX/micropython,martinribelotta/micropython,Timmenem/micropython,micropython/micropython-esp32,xuxiaoxin/micropython,mpalomer/micropython,deshipu/micropython,mianos/micropython,cloudformdesign/micropython,selste/micropython,Peetz0r/micropython-esp32,EcmaXp/micropython,adafruit/micropython,toolmacher/micropython,xhat/micropython,micropython/micropython-esp32,stonegithubs/micropython,blazewicz/micropython,tuc-osg/micropython,lbattraw/micropython,warner83/micropython,TDAbboud/micropython,oopy/micropython,orionrobots/micropython,selste/micropython,xhat/micropython,adafruit/micropython,omtinez/micropython,EcmaXp/micropython,oopy/micropython,HenrikSolver/micropython,AriZuu/micropython,kerneltask/micropython,stonegithubs/micropython,tobbad/micropython,misterdanb/micropython,tdautc19841202/micropython,adafruit/circuitpython,Timmenem/micropython,stonegithubs/micropython,jimkmc/micropython,methoxid/micropystat,HenrikSolver/micropython,noahchense/micropython,emfcamp/micropython,ryannathans/micropython,adafruit/circuitpython,MrSurly/micropython-esp32,ceramos/micropython,MrSurly/micropython,tuc-osg/micropython,pozetroninc/micropython,alex-march/micropython,xyb/micropython,aethaniel/micropython,MrSurly/micropython,firstval/micropython,vitiral/micropython,blmorris/micropython,methoxid/micropystat,Peetz0r/micropython-esp32,ahotam/micropython,tdautc19841202/micropython,kerneltask/micropython,xuxiaoxin/micropython,blmorris/micropython,dxxb/micropython,tuc-osg/micropython,utopiaprince/micropython,praemdonck/micropython,noahchense/micropython,PappaPeppar/micropython,torwag/micropython,oopy/micropython,noahchense/micropython,oopy/micropython,SungEun-Steve-Kim/test-mp,skybird6672/micropython,tuc-osg/micropython,adafruit/circuitpython,jlillest/micropython,micropython/micropython-esp32,omtinez/micropython,xuxiaoxin/micropython,Vogtinator/micropython,noahwilliamsson/micropython,mpalomer/micropython,feilongfl/micropython,hosaka/micropython,matthewelse/micropython,matthewelse/micropython,dxxb/micropython,AriZuu/micropython,blmorris/micropython,alex-march/micropython,warner83/micropython,chrisdearman/micropython,orionrobots/micropython,adamkh/micropython,dinau/micropython,deshipu/micropython,MrSurly/micropython,lowRISC/micropython,mpalomer/micropython,matthewelse/micropython,pfalcon/micropython,orionrobots/micropython,MrSurly/micropython-esp32,alex-march/micropython,misterdanb/micropython,galenhz/micropython,SungEun-Steve-Kim/test-mp,selste/micropython,jimkmc/micropython,toolmacher/micropython,mhoffma/micropython,micropython/micropython-esp32,danicampora/micropython,KISSMonX/micropython,ryannathans/micropython,ahotam/micropython,heisewangluo/micropython,ganshun666/micropython,misterdanb/micropython,tobbad/micropython,stonegithubs/micropython,ceramos/micropython,suda/micropython,slzatz/micropython,skybird6672/micropython,ruffy91/micropython,neilh10/micropython,ryannathans/micropython,jmarcelino/pycom-micropython,dinau/micropython,mhoffma/micropython,adamkh/micropython,noahchense/micropython,omtinez/micropython,ernesto-g/micropython,pfalcon/micropython,Timmenem/micropython,deshipu/micropython,aethaniel/micropython,kostyll/micropython,mgyenik/micropython,utopiaprince/micropython,HenrikSolver/micropython,adafruit/circuitpython,heisewangluo/micropython,redbear/micropython,ChuckM/micropython,dhylands/micropython,turbinenreiter/micropython,toolmacher/micropython,drrk/micropython,galenhz/micropython,MrSurly/micropython-esp32,vitiral/micropython,ruffy91/micropython,oopy/micropython,chrisdearman/micropython,heisewangluo/micropython,tralamazza/micropython,ahotam/micropython,paul-xxx/micropython,suda/micropython,rubencabrera/micropython,tobbad/micropython,PappaPeppar/micropython,bvernoux/micropython,mgyenik/micropython,tdautc19841202/micropython,PappaPeppar/micropython,trezor/micropython,trezor/micropython,hiway/micropython,feilongfl/micropython,ericsnowcurrently/micropython,cwyark/micropython,bvernoux/micropython,MrSurly/micropython-esp32,emfcamp/micropython,xyb/micropython,feilongfl/micropython,slzatz/micropython,dmazzella/micropython,vitiral/micropython,chrisdearman/micropython,emfcamp/micropython,MrSurly/micropython,adamkh/micropython,xuxiaoxin/micropython,kostyll/micropython,ernesto-g/micropython,misterdanb/micropython,utopiaprince/micropython,ChuckM/micropython,martinribelotta/micropython,MrSurly/micropython,methoxid/micropystat,Vogtinator/micropython,jimkmc/micropython,pozetroninc/micropython,cloudformdesign/micropython,warner83/micropython,lowRISC/micropython,AriZuu/micropython,redbear/micropython,noahwilliamsson/micropython,henriknelson/micropython,galenhz/micropython,vriera/micropython,alex-robbins/micropython,cloudformdesign/micropython,paul-xxx/micropython,neilh10/micropython,deshipu/micropython,infinnovation/micropython,swegener/micropython,tuc-osg/micropython,martinribelotta/micropython,matthewelse/micropython,paul-xxx/micropython,puuu/micropython,dinau/micropython,EcmaXp/micropython,henriknelson/micropython,suda/micropython,drrk/micropython,aethaniel/micropython,blazewicz/micropython,PappaPeppar/micropython,trezor/micropython,infinnovation/micropython,noahwilliamsson/micropython,utopiaprince/micropython,ChuckM/micropython,firstval/micropython,firstval/micropython,Vogtinator/micropython,suda/micropython,mpalomer/micropython,turbinenreiter/micropython,neilh10/micropython,cloudformdesign/micropython,torwag/micropython,jimkmc/micropython,mianos/micropython,rubencabrera/micropython,alex-robbins/micropython,stonegithubs/micropython,ernesto-g/micropython,supergis/micropython,ruffy91/micropython,toolmacher/micropython,hosaka/micropython,dxxb/micropython,EcmaXp/micropython,ChuckM/micropython,pramasoul/micropython,torwag/micropython,selste/micropython,TDAbboud/micropython,hosaka/micropython,henriknelson/micropython,noahchense/micropython,infinnovation/micropython,feilongfl/micropython,mianos/micropython,lowRISC/micropython,ceramos/micropython,dhylands/micropython,vriera/micropython,heisewangluo/micropython,infinnovation/micropython,xuxiaoxin/micropython,supergis/micropython,galenhz/micropython,neilh10/micropython,pfalcon/micropython,emfcamp/micropython,lbattraw/micropython,hosaka/micropython,SungEun-Steve-Kim/test-mp,blmorris/micropython,adafruit/micropython,cnoviello/micropython,adamkh/micropython,bvernoux/micropython,bvernoux/micropython,turbinenreiter/micropython,matthewelse/micropython,supergis/micropython,neilh10/micropython,lowRISC/micropython,Peetz0r/micropython-esp32,redbear/micropython,adafruit/micropython,swegener/micropython,HenrikSolver/micropython,xhat/micropython,alex-march/micropython,skybird6672/micropython,turbinenreiter/micropython,pramasoul/micropython,cwyark/micropython,praemdonck/micropython,ryannathans/micropython,noahwilliamsson/micropython,praemdonck/micropython,turbinenreiter/micropython,rubencabrera/micropython,KISSMonX/micropython,Vogtinator/micropython,methoxid/micropystat,emfcamp/micropython,heisewangluo/micropython,skybird6672/micropython,MrSurly/micropython-esp32,mianos/micropython,kostyll/micropython,AriZuu/micropython,rubencabrera/micropython,dxxb/micropython,xyb/micropython,trezor/micropython,hiway/micropython,ganshun666/micropython,redbear/micropython,dmazzella/micropython,firstval/micropython,HenrikSolver/micropython,TDAbboud/micropython,swegener/micropython,methoxid/micropystat,jmarcelino/pycom-micropython,xyb/micropython,hiway/micropython,dhylands/micropython,feilongfl/micropython,puuu/micropython,dmazzella/micropython,lbattraw/micropython,kerneltask/micropython,vriera/micropython,infinnovation/micropython,jmarcelino/pycom-micropython,slzatz/micropython,PappaPeppar/micropython,tdautc19841202/micropython,tdautc19841202/micropython,orionrobots/micropython,slzatz/micropython,adafruit/circuitpython,drrk/micropython,blazewicz/micropython,Peetz0r/micropython-esp32,KISSMonX/micropython,jimkmc/micropython,SungEun-Steve-Kim/test-mp,bvernoux/micropython,pozetroninc/micropython,kerneltask/micropython,ruffy91/micropython,puuu/micropython,cnoviello/micropython,lowRISC/micropython,dxxb/micropython,cnoviello/micropython,vriera/micropython,pozetroninc/micropython,mianos/micropython,slzatz/micropython,hosaka/micropython,tralamazza/micropython,mgyenik/micropython,kostyll/micropython,henriknelson/micropython,pozetroninc/micropython,SHA2017-badge/micropython-esp32,jlillest/micropython,drrk/micropython,rubencabrera/micropython,cwyark/micropython,vitiral/micropython,galenhz/micropython,pramasoul/micropython,chrisdearman/micropython,EcmaXp/micropython,TDAbboud/micropython,alex-robbins/micropython,ganshun666/micropython,SHA2017-badge/micropython-esp32,aethaniel/micropython,pramasoul/micropython,micropython/micropython-esp32,trezor/micropython,hiway/micropython,puuu/micropython,torwag/micropython,cwyark/micropython,omtinez/micropython,cloudformdesign/micropython,ganshun666/micropython,swegener/micropython,pfalcon/micropython,orionrobots/micropython,praemdonck/micropython,ernesto-g/micropython,mhoffma/micropython,omtinez/micropython,lbattraw/micropython,supergis/micropython,lbattraw/micropython,ChuckM/micropython,ganshun666/micropython