Let's say you have this:

  <message name="NAME" desc="Some desc.">
    This happened on this site: <ph name="BEGIN_BOLD">&lt;strong&gt;</ph><ph name="DOMAIN">$1<ex>acmecorp.com</ex></ph><ph name="END_BOLD">&lt;/strong&gt;</ph>.
  </message>

Then GRIT will expand this into (as seen once put as innerHTML):

"This happened on this site: "
<strong>site.com</strong>
"."

Which renders with whitespace between site.com and the final period.

GRIT should never add a carriage return after </ph> and before whatever is next.

This contributes to a number of UI messages in Chromium/Chromium OS looking odd because of typesetting issues.