While the ref name encoding is unspecified, UTF-8 is preferred as
some output processing may assume ref names in UTF-8.
+'@'::
+ '@' alone is a shortcut for 'HEAD'.
+
'<refname>@\{<date>\}', e.g. 'master@\{yesterday\}', 'HEAD@\{5 minutes ago\}'::
A ref followed by the suffix '@' with a date specification
enclosed in a brace
'<rev1>..<rev2>'::
Include commits that are reachable from <rev2> but exclude
- those that are reachable from <rev1>.
+ those that are reachable from <rev1>. When either <rev1> or
+ <rev2> is omitted, it defaults to 'HEAD'.
'<rev1>\...<rev2>'::
Include commits that are reachable from either <rev1> or
- <rev2> but exclude those that are reachable from both.
+ <rev2> but exclude those that are reachable from both. When
+ either <rev1> or <rev2> is omitted, it defaults to 'HEAD'.
'<rev>{caret}@', e.g. 'HEAD{caret}@'::
A suffix '{caret}' followed by an at sign is the same as listing