* doc/org-manual.org (Special Properties): Remove claim that angular
brackets are stripped from DEADLINE and SCHEDULED time stamps, which
has not been true since v8.3, specifically 8d8ad9838.
It doesn't seem like 8d8ad9838 (Rewrite `org-entry-properties',
2014-09-30) intended to change this behavior, but let's stick with it
because some spots in Org's code base depend on it and it's likely
that third-party code does too.
Also, replace "time string" with "timestamp" in DEADLINE's description
for consistency with the other descriptions.
75902a4732