identify: change {parents} to a list of nodes (BC)

identify: change {parents} to a list of nodes (BC)

This is a part of the name unification. {parents} is a list of nodes in
"hg log -Tjson" output. Since {rev} can be computed from (repo, node) pair,
we no longer need to put it to provide {rev} to user templates.

https://www.mercurial-scm.org/wiki/GenericTemplatingPlan#Dictionary

--- a/mercurial/commands.py	Sat Sep 01 12:09:22 2018 +0900
+++ b/mercurial/commands.py	Sat Sep 01 12:15:02 2018 +0900
@@ -3058,13 +3058,8 @@
                 numoutput = ["%d" % p.rev() for p in parents]
                 output.append("%s%s" % ('+'.join(numoutput), dirty))
 
-            fn = fm.nested('parents', tmpl='{rev}:{node|formatnode}', sep=' ')
-            for p in parents:
-                fn.startitem()
-                fn.data(rev=p.rev())
-                fn.data(node=p.hex())
-                fn.context(ctx=p)
-            fn.end()
+            fm.data(parents=fm.formatlist([fm.hexfunc(p.node())
+                                           for p in parents], name='node'))
         else:
             hexoutput = fm.hexfunc(ctx.node())
             if default or id:

--- a/tests/test-identify.t	Sat Sep 01 12:09:22 2018 +0900
+++ b/tests/test-identify.t	Sat Sep 01 12:15:02 2018 +0900
@@ -51,7 +51,7 @@
     "dirty": "",
     "id": "cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b",
     "node": "ffffffffffffffffffffffffffffffffffffffff",
-    "parents": [{"node": "cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b", "rev": 0}],
+    "parents": ["cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b"],
     "tags": ["tip"]
    }
   ]
@@ -63,7 +63,7 @@
   $ hg id -T '{parents % "{rev} {node|shortest} {desc}\n"}'
   0 cb9a a
   $ hg id -T '{parents}\n'
-  0:cb9a9f314b8b
+  cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
 
 test nested template: '{tags}'/'{node}' constants shouldn't override the
 default keywords, but '{id}' persists because there's no default keyword
@@ -88,7 +88,7 @@
     "dirty": "+",
     "id": "cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b+",
     "node": "ffffffffffffffffffffffffffffffffffffffff",
-    "parents": [{"node": "cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b", "rev": 0}],
+    "parents": ["cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b"],
     "tags": ["tip"]
    }
   ]

--- a/tests/test-merge-default.t	Sat Sep 01 12:09:22 2018 +0900
+++ b/tests/test-merge-default.t	Sat Sep 01 12:15:02 2018 +0900
@@ -57,7 +57,7 @@
     "dirty": "+",
     "id": "f25cbe84d8b320e298e7703f18a25a3959518c23+2d95304fed5d89bc9d70b2a0d02f0d567469c3ab+",
     "node": "ffffffffffffffffffffffffffffffffffffffff",
-    "parents": [{"node": "f25cbe84d8b320e298e7703f18a25a3959518c23", "rev": 4}, {"node": "2d95304fed5d89bc9d70b2a0d02f0d567469c3ab", "rev": 2}],
+    "parents": ["f25cbe84d8b320e298e7703f18a25a3959518c23", "2d95304fed5d89bc9d70b2a0d02f0d567469c3ab"],
     "tags": ["tip"]
    }
   ]