-<since>..<until>::
- Show only commits between the named two commits. When
- either <since> or <until> is omitted, it defaults to
- `HEAD`, i.e. the tip of the current branch.
- For a more complete list of ways to spell <since>
- and <until>, see linkgit:gitrevisions[7].
+<revision range>::
+ Show only commits in the specified revision range. When no
+ <revision range> is specified, it defaults to `HEAD` (i.e. the
+ whole history leading to the current commit). `origin..HEAD`
+ specifies all the commits reachable from the current commit
+ (i.e. `HEAD`), but not from `origin`. For a complete list of
+ ways to spell <revision range>, see the "Specifying Ranges"
+ section of linkgit:gitrevisions[7].