doc: revisions - define `reachable`

Do not self-define `reachable`, which can lead to misunderstanding. Instead define `reachability` explictly. Signed-off-by: Philip Oakley <philipoakley@iee.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Philip Oakley committed Aug 12, 2016 at 08:07 UTC 0b451248b398240c92bc2d48e96d7c3838c12349
1 file changed +10 -4
Documentation/revisions.txt
+10 -4
@@ -236,10 +236,16 @@ SPECIFYING RANGES
236 -----------------
237
238 History traversing commands such as `git log` operate on a set
239 -of commits, not just a single commit. To these commands,
240 -specifying a single revision with the notation described in the
241 -previous section means the set of commits reachable from that
242 -commit, following the commit ancestry chain.
239 +of commits, not just a single commit.
240 +
241 +For these commands,
242 +specifying a single revision, using the notation described in the
243 +previous section, means the set of commits `reachable` from the given
244 +commit.
245 +
246 +A commit's reachable set is the commit itself and the commits in
247 +its ancestry chain.
248 +
249
250 Commit Exclusions
251 ~~~~~~~~~~~~~~~~~