Fix SCRIPT tag in "diag_arp.php"
Fix SCRIPT tag in "diag_arp.php"

Add missing double quote
Tidy up coding style

phil-davis/pfsense,ch1c4um/pfsense,jxmx/pfsense,BlackstarGroup/pfsense,ch1c4um/pfsense,ptorsten/pfsense,phil-davis/pfsense,pfsense/pfsense,NOYB/pfsense,ptorsten/pfsense,pfsense/pfsense,pfsense/pfsense,NewEraCracker/pfsense,dennypage/pfsense,ch1c4um/pfsense,NOYB/pfsense,brunostein/pfsense,jxmx/pfsense,phil-davis/pfsense,jxmx/pfsense,ptorsten/pfsense,BlackstarGroup/pfsense,BlackstarGroup/pfsense,BlackstarGroup/pfsense,NewEraCracker/pfsense,dennypage/pfsense,dennypage/pfsense,NewEraCracker/pfsense,phil-davis/pfsense,brunostein/pfsense,NOYB/pfsense,NewEraCracker/pfsense,brunostein/pfsense,dennypage/pfsense,pfsense/pfsense,ch1c4um/pfsense