clarify single letter option requirements
clarify single letter option requirements

nimLuckyBull/Nim,judofyr/Nim,kirbyfan64/Nim,BlaXpirit/nim,mbaulch/Nim,dom96/Nim,BlaXpirit/nim,fredericksilva/Nim,dom96/Nim,bvssvni/Nim,xland/Nim,fredericksilva/Nim,gokr/Nim,Matt14916/Nim,greyanubis/Nim,Dhertz/Nim,reactormonk/nim,Senketsu/Nim,bvssvni/Nim,MrJohz/Nim,bvssvni/Nim,judofyr/Nim,zachaysan/Nim,BlaXpirit/nim,endragor/Nim,reactormonk/nim,reactormonk/nim,nanoant/Nim,fredericksilva/Nim,kirbyfan64/Nim,russpowers/Nim,sferik/Nim,douglas-larocca/Nim,russpowers/Nim,gokr/Nim,MrJohz/Nim,Senketsu/Nim,JCavallo/Nim,fmamud/Nim,tmm1/Nim,Dhertz/Nim,xland/Nim,mbaulch/Nim,endragor/Nim,singularperturbation/Nim,fredericksilva/Nim,zachaysan/Nim,fmamud/Nim,Matt14916/Nim,singularperturbation/Nim,jfhg/Nim,sarvex/Nim-lang,mbaulch/Nim,dom96/Nim,Senketsu/Nim,xland/Nim,Senketsu/Nim,russpowers/Nim,haiodo/Nim,Dhertz/Nim,JCavallo/Nim,sferik/Nim,Matt14916/Nim,tulayang/Nim,nanoant/Nim,BlaXpirit/nim,Dhertz/Nim,dom96/Nim,jsanjuas/Nim,greyanubis/Nim,sferik/Nim,russpowers/Nim,nafsaka/Nim,sferik/Nim,jfhg/Nim,sarvex/Nim-lang,fmamud/Nim,msmith491/Nim,Salafit/Nim,tmm1/Nim,reactormonk/nim,tmm1/Nim,xland/Nim,greyanubis/Nim,haiodo/Nim,dom96/Nim,JCavallo/Nim,tulayang/Nim,douglas-larocca/Nim,BlaXpirit/nim,endragor/Nim,singularperturbation/Nim,endragor/Nim,nimLuckyBull/Nim,nanoant/Nim,haiodo/Nim,nafsaka/Nim,kirbyfan64/Nim,xland/Nim,fmamud/Nim,russpowers/Nim,fredericksilva/Nim,fredericksilva/Nim,nimLuckyBull/Nim,MrJohz/Nim,douglas-larocca/Nim,fredericksilva/Nim,reactormonk/nim,douglas-larocca/Nim,Salafit/Nim,fmamud/Nim,nimLuckyBull/Nim,JCavallo/Nim,JCavallo/Nim,nafsaka/Nim,Salafit/Nim,SSPkrolik/Nim,mbaulch/Nim,jfhg/Nim,gokr/Nim,jfhg/Nim,greyanubis/Nim,haiodo/Nim,tmm1/Nim,greyanubis/Nim,russpowers/Nim,SSPkrolik/Nim,tmm1/Nim,msmith491/Nim,mbaulch/Nim,xland/Nim,tmm1/Nim,Dhertz/Nim,sferik/Nim,mbaulch/Nim,tulayang/Nim,haiodo/Nim,jsanjuas/Nim,Salafit/Nim,jsanjuas/Nim,Dhertz/Nim,sferik/Nim,zachaysan/Nim,msmith491/Nim,judofyr/Nim,SSPkrolik/Nim,SSPkrolik/Nim,SSPkrolik/Nim,Senketsu/Nim,judofyr/Nim,kirbyfan64/Nim,reactormonk/nim,gokr/Nim,bvssvni/Nim,gokr/Nim,fmamud/Nim,Salafit/Nim,msmith491/Nim,singularperturbation/Nim,MrJohz/Nim,judofyr/Nim,endragor/Nim,jfhg/Nim,sarvex/Nim-lang,sarvex/Nim-lang,kirbyfan64/Nim,fmamud/Nim,douglas-larocca/Nim,gokr/Nim,Dhertz/Nim,reactormonk/nim,SSPkrolik/Nim,zachaysan/Nim,dom96/Nim,mbaulch/Nim,msmith491/Nim,MrJohz/Nim,tulayang/Nim,nafsaka/Nim,singularperturbation/Nim,endragor/Nim,JCavallo/Nim,Matt14916/Nim,nimLuckyBull/Nim,nafsaka/Nim,bvssvni/Nim,judofyr/Nim,nimLuckyBull/Nim,greyanubis/Nim,zachaysan/Nim,sferik/Nim,SSPkrolik/Nim,msmith491/Nim,Matt14916/Nim,xland/Nim,nanoant/Nim,Matt14916/Nim,kirbyfan64/Nim,russpowers/Nim,MrJohz/Nim,jsanjuas/Nim,zachaysan/Nim,sferik/Nim,bvssvni/Nim,SSPkrolik/Nim,Matt14916/Nim,endragor/Nim,kirbyfan64/Nim,fredericksilva/Nim,BlaXpirit/nim,tulayang/Nim,nanoant/Nim,bvssvni/Nim,gokr/Nim,singularperturbation/Nim,jsanjuas/Nim,haiodo/Nim,greyanubis/Nim,singularperturbation/Nim,msmith491/Nim,douglas-larocca/Nim,Salafit/Nim,reactormonk/nim,nimLuckyBull/Nim,Senketsu/Nim,judofyr/Nim,kirbyfan64/Nim,dom96/Nim,nafsaka/Nim,jsanjuas/Nim,nanoant/Nim,jfhg/Nim,BlaXpirit/nim,zachaysan/Nim,haiodo/Nim,BlaXpirit/nim,Salafit/Nim,jfhg/Nim,sarvex/Nim-lang,Senketsu/Nim,nafsaka/Nim,JCavallo/Nim,sarvex/Nim-lang,sarvex/Nim-lang,tulayang/Nim,jsanjuas/Nim,gokr/Nim,douglas-larocca/Nim,MrJohz/Nim,judofyr/Nim,tmm1/Nim,nanoant/Nim,douglas-larocca/Nim