Merge branch 'pb/log-rev-list-doc' into jch

"git help log" has been enhanced by sharing more material from the
documentation for the underlying "git rev-list" command.

* pb/log-rev-list-doc:
  git-log.txt: include rev-list-description.txt
  git-rev-list.txt: move description to separate file
  git-rev-list.txt: tweak wording in set operations
  git-rev-list.txt: fix Asciidoc syntax
  revisions.txt: describe 'rev1 rev2 ...' meaning for ranges
  git-log.txt: add links to 'rev-list' and 'diff' docs

Author: gitster

Documentation/git-log.txt

@@ -15,9 +15,12 @@ DESCRIPTION
 -----------
 Shows the commit logs.
 
-The command takes options applicable to the `git rev-list`
+:git-log: 1
+include::rev-list-description.txt[]
+
+The command takes options applicable to the linkgit:git-rev-list[1]
 command to control what is shown and how, and options applicable to
-the `git diff-*` commands to control how the changes
+the linkgit:git-diff[1] command to control how the changes
 each commit introduces are shown.
 
 

Documentation/git-rev-list.txt

@@ -14,44 +14,8 @@ SYNOPSIS
 DESCRIPTION
 -----------
 
-List commits that are reachable by following the `parent` links from the
-given commit(s), but exclude commits that are reachable from the one(s)
-given with a '{caret}' in front of them.  The output is given in reverse
-chronological order by default.
-
-You can think of this as a set operation.  Commits given on the command
-line form a set of commits that are reachable from any of them, and then
-commits reachable from any of the ones given with '{caret}' in front are
-subtracted from that set.  The remaining commits are what comes out in the
-command's output.  Various other options and paths parameters can be used
-to further limit the result.
-
-Thus, the following command:
-
------------------------------------------------------------------------
-	$ git rev-list foo bar ^baz
------------------------------------------------------------------------
-
-means "list all the commits which are reachable from 'foo' or 'bar', but
-not from 'baz'".
-
-A special notation "'<commit1>'..'<commit2>'" can be used as a
-short-hand for "{caret}'<commit1>' '<commit2>'". For example, either of
-the following may be used interchangeably:
-
------------------------------------------------------------------------
-	$ git rev-list origin..HEAD
-	$ git rev-list HEAD ^origin
------------------------------------------------------------------------
-
-Another special notation is "'<commit1>'...'<commit2>'" which is useful
-for merges.  The resulting set of commits is the symmetric difference
-between the two operands.  The following two commands are equivalent:
-
------------------------------------------------------------------------
-	$ git rev-list A B --not $(git merge-base --all A B)
-	$ git rev-list A...B
------------------------------------------------------------------------
+:git-rev-list: 1
+include::rev-list-description.txt[]
 
 'rev-list' is a very essential Git command, since it
 provides the ability to build and traverse commit ancestry graphs. For

Documentation/rev-list-description.txt

@@ -0,0 +1,61 @@
+List commits that are reachable by following the `parent` links from the
+given commit(s), but exclude commits that are reachable from the one(s)
+given with a '{caret}' in front of them.  The output is given in reverse
+chronological order by default.
+
+You can think of this as a set operation. Commits reachable from any of
+the commits given on the command line form a set, and then commits reachable
+from any of the ones given with '{caret}' in front are subtracted from that
+set.  The remaining commits are what comes out in the command's output.
+Various other options and paths parameters can be used to further limit the
+result.
+
+Thus, the following command:
+
+ifdef::git-rev-list[]
+-----------------------------------------------------------------------
+$ git rev-list foo bar ^baz
+-----------------------------------------------------------------------
+endif::git-rev-list[]
+ifdef::git-log[]
+-----------------------------------------------------------------------
+$ git log foo bar ^baz
+-----------------------------------------------------------------------
+endif::git-log[]
+
+means "list all the commits which are reachable from 'foo' or 'bar', but
+not from 'baz'".
+
+A special notation "'<commit1>'..'<commit2>'" can be used as a
+short-hand for "^'<commit1>' '<commit2>'". For example, either of
+the following may be used interchangeably:
+
+ifdef::git-rev-list[]
+-----------------------------------------------------------------------
+$ git rev-list origin..HEAD
+$ git rev-list HEAD ^origin
+-----------------------------------------------------------------------
+endif::git-rev-list[]
+ifdef::git-log[]
+-----------------------------------------------------------------------
+$ git log origin..HEAD
+$ git log HEAD ^origin
+-----------------------------------------------------------------------
+endif::git-log[]
+
+Another special notation is "'<commit1>'...'<commit2>'" which is useful
+for merges.  The resulting set of commits is the symmetric difference
+between the two operands.  The following two commands are equivalent:
+
+ifdef::git-rev-list[]
+-----------------------------------------------------------------------
+$ git rev-list A B --not $(git merge-base --all A B)
+$ git rev-list A...B
+-----------------------------------------------------------------------
+endif::git-rev-list[]
+ifdef::git-log[]
+-----------------------------------------------------------------------
+$ git log A B --not $(git merge-base --all A B)
+$ git log A...B
+-----------------------------------------------------------------------
+endif::git-log[]

Documentation/revisions.txt

@@ -254,6 +254,9 @@ specifying a single revision, using the notation described in the
 previous section, means the set of commits `reachable` from the given
 commit.
 
+Specifying several revisions means the set of commits reachable from
+any of the given commits.
+
 A commit's reachable set is the commit itself and the commits in
 its ancestry chain.