config: use 'experimental.evolution.allowunstable'

Extract 'experimental.evolution' = allowunstable as
'experimental.evolution.allowunstable'.

We keep the new option in the 'experimental.evolution' namespace in order to
stay coherent with other options ('experimental.evolution.bundle-obsmarker'
and 'experimental.evolution.track-operation') ease the renaming as possibly
'evolution.allowunstable'.

Differential Revision: https://phab.mercurial-scm.org/D1150

tests/test-amend.t

@@ -180,8 +180,8 b' With allowunstable, amend could work in '
 
   $ cat >> $HGRCPATH <<EOF
   > [experimental]
-  > evolution=allowunstable
   > evolution.createmarkers=True
+  > evolution.allowunstable=True
   > EOF
 
   $ hg amend

tests/test-commit-amend.t

@@ -519,8 +519,8 b' Enable obsolete'
 
   $ cat >> $HGRCPATH << EOF
   > [experimental]
-  > evolution=allowunstable
   > evolution.createmarkers=True
+  > evolution.allowunstable=True
   > EOF
 
 Amend with no files changes

tests/test-histedit-arguments.t

@@ -496,8 +496,8 b' amend should not be blocked by the ongoi'
 
   $ cat >>$HGRCPATH <<EOF
   > [experimental]
-  > evolution=allowunstable
   > evolution.createmarkers=True
+  > evolution.allowunstable=True
   > EOF
   $ hg commit --amend -m 'allow this fold'
   $ hg histedit --continue

tests/test-histedit-obsolete.t

@@ -8,8 +8,8 b' Enable obsolete'
   > [phases]
   > publish=False
   > [experimental]
-  > evolution=allowunstable
   > evolution.createmarkers=True
+  > evolution.allowunstable=True
   > [extensions]
   > histedit=
   > rebase=

tests/test-rebase-brute-force.t

@@ -3,8 +3,8 b''
   > drawdag=$TESTDIR/drawdag.py
   > bruterebase=$TESTDIR/bruterebase.py
   > [experimental]
-  > evolution=allowunstable
   > evolution.createmarkers=True
+  > evolution.allowunstable=True
   > EOF
   $ init() {
   >   N=`expr ${N:-0} + 1`

tests/test-rebase-obsolete.t

@@ -8,8 +8,8 b' Enable obsolete'
   > [ui]
   > logtemplate= {rev}:{node|short} {desc|firstline}
   > [experimental]
-  > evolution=allowunstable
   > evolution.createmarkers=True
+  > evolution.allowunstable=True
   > [phases]
   > publish=False
   > [extensions]

tests/test-rebase-partial.t

@@ -7,8 +7,8 b' destination (issue5422)'
   > drawdag=$TESTDIR/drawdag.py
   > 
   > [experimental]
-  > evolution=allowunstable
   > evolution.createmarkers=True
+  > evolution.allowunstable=True
   > 
   > [alias]
   > tglog = log -G --template "{rev}: {desc}"

tests/test-uncommit.t

@@ -2,8 +2,8 b' Test uncommit - set up the config'
 
   $ cat >> $HGRCPATH <<EOF
   > [experimental]
-  > evolution=allowunstable
   > evolution.createmarkers=True
+  > evolution.allowunstable=True
   > [extensions]
   > uncommit =
   > drawdag=$TESTDIR/drawdag.py