Added startsWith/endsWith implementations for character prefix/suffix (fixes #4252).
Added startsWith/endsWith implementations for character prefix/suffix (fixes #4252).

haiodo/Nim,haiodo/Nim,haiodo/Nim,mbaulch/Nim,singularperturbation/Nim,mbaulch/Nim,jfhg/Nim,jfhg/Nim,dom96/Nim,singularperturbation/Nim,haiodo/Nim,haiodo/Nim,mbaulch/Nim,singularperturbation/Nim,jfhg/Nim,dom96/Nim,mbaulch/Nim,mbaulch/Nim,russpowers/Nim,zachaysan/Nim,tulayang/Nim,mbaulch/Nim,haiodo/Nim,zachaysan/Nim,singularperturbation/Nim,russpowers/Nim,russpowers/Nim,zachaysan/Nim,zachaysan/Nim,singularperturbation/Nim,jfhg/Nim,russpowers/Nim,jfhg/Nim,dom96/Nim,dom96/Nim,tulayang/Nim,tulayang/Nim,dom96/Nim,mbaulch/Nim,jfhg/Nim,dom96/Nim,russpowers/Nim,tulayang/Nim,russpowers/Nim,tulayang/Nim,singularperturbation/Nim,zachaysan/Nim,zachaysan/Nim,dom96/Nim,jfhg/Nim,tulayang/Nim,zachaysan/Nim,haiodo/Nim,singularperturbation/Nim,russpowers/Nim