fix: link will be nil when cleanString contains Chinese characters
fix: link will be nil when cleanString contains Chinese characters

Akylas/DTCoreText,Cocoanetics/DTCoreText,rgregg/DTCoreText,Akylas/DTCoreText,rgregg/DTCoreText,pivotaltracker/DTCoreText,Cocoanetics/DTCoreText,Cocoanetics/DTCoreText