Documentation: mention config sources for @{upstream}

The earlier documentation made vague references to "is set to build on". Flesh that out with references to the config settings, so folks can use git-config(1) to get more detail on what @{upstream} means. For example, @{upstream} does not care about remote.pushdefault or branch.<name>.pushremote. Signed-off-by: W. Trevor King <wking@tremily.us> Signed-off-by: Junio C Hamano <gitster@pobox.com>

W. Trevor King committed May 13, 2014 at 11:46 UTC 670a7297c2afe4de387cb208fddc90f0f59df6aa
1 file changed +3 -1
Documentation/revisions.txt
+3 -1
@@ -94,7 +94,9 @@ some output processing may assume ref names in UTF-8.
94 '<branchname>@\{upstream\}', e.g. 'master@\{upstream\}', '@\{u\}'::
95 The suffix '@\{upstream\}' to a branchname (short form '<branchname>@\{u\}')
96 refers to the branch that the branch specified by branchname is set to build on
97 - top of. A missing branchname defaults to the current one.
97 + top of (configured with `branch.<name>.remote` and
98 + `branch.<name>.merge`). A missing branchname defaults to the
99 + current one.
100
101 '<rev>{caret}', e.g. 'HEAD{caret}, v1.5.1{caret}0'::
102 A suffix '{caret}' to a revision parameter means the first parent of