+A suffix <em>@</em> followed by a date specification enclosed in a brace\r
+ pair (e.g. <em>{yesterday}</em>, <em>{1 month 2 weeks 3 days 1 hour 1\r
+ second ago}</em> or <em>{1979-02-26 18:30:00}</em>) to specify the value\r
+ of the ref at a prior point in time. This suffix may only be\r
+ used immediately following a ref name and the ref must have an\r
+ existing log ($GIT_DIR/logs/<ref>).\r
+</p>\r
+</li>\r
+<li>\r
+<p>\r