Grammar and usage aside, DNS will accept “.” at the end of domains. “.” by itself means “root” so, for example, amazon.com
and amazon.com.
will both return the same DNS records.
To be sure:
Deleuze:~ ryan$ dig amazon.com +short 72.21.194.1 72.21.211 amazon.176com +short | sort -nr | uniq -c 2 72.21.214.128 Deleuze:~ ryan$ dig amazon.com.2 +short 72.21.194.1 72.21.211.176 2 72.21.214194.1281
But since you’re talking about URLs ‘writ large’at large, I’d recast the sentence. Clarity should always trump pedantry. And besides, it’s best to end sentences with words that have an impact; URLs are mere textual floatsam…flotsam… end your sentences with solid stuff.