context: rename troubled into isunstable

As we changed the meaning of unstable between the old vocabulary and the new
one, we can't reuse the unstable method name at the risk of breaking
extensions calling unstable and getting a wrong result.

Instead rename troubled into isunstable so extensions will continue to work.

The renaming is done according to
https://www.mercurial-scm.org/wiki/CEDVocabulary.

Differential Revision: https://phab.mercurial-scm.org/D242

mercurial/cmdutil.py

@@ -1464,7 +1464,7 b' def _changesetlabels(ctx):'
     labels = ['log.changeset', 'changeset.%s' % ctx.phasestr()]
     if ctx.obsolete():
         labels.append('changeset.obsolete')
-    if ctx.troubled():
+    if ctx.isunstable():
         labels.append('changeset.troubled')
         for instability in ctx.instabilities():
             labels.append('trouble.%s' % instability)
@@ -1577,7 +1577,7 b' class changeset_printer(object):'
         self.ui.write(_("date:        %s\n") % date,
                       label='log.date')
 
-        if ctx.troubled():
+        if ctx.isunstable():
             # i18n: column positioning for "hg log"
             instabilities = ctx.instabilities()
             self.ui.write(_("instability: %s\n") % ', '.join(instabilities),

mercurial/commands.py

@@ -4849,7 +4849,7 b' def summary(ui, repo, **opts):'
                 ui.write(_(' (no revision checked out)'))
         if p.obsolete():
             ui.write(_(' (obsolete)'))
-        if p.troubled():
+        if p.isunstable():
             instabilities = (ui.label(instability, 'trouble.%s' % instability)
                              for instability in p.instabilities())
             ui.write(' ('

mercurial/context.py

@@ -240,6 +240,12 b' class basectx(object):'
         return self.rev() in obsmod.getrevs(self._repo, 'divergent')
 
     def troubled(self):
+        msg = ("'context.troubled' is deprecated, "
+               "use 'context.isunstable'")
+        self._repo.ui.deprecwarn(msg, '4.4')
+        return self.unstable()
+
+    def isunstable(self):
         """True if the changeset is either unstable, bumped or divergent"""
         return self.orphan() or self.phasedivergent() or self.contentdivergent()
 

mercurial/exchange.py

@@ -680,7 +680,7 b' def _pushcheckoutgoing(pushop):'
                 ctx = unfi[node]
                 if ctx.obsolete():
                     raise error.Abort(mso % ctx)
-                elif ctx.troubled():
+                elif ctx.isunstable():
                     # TODO print more than one instability in the abort
                     # message
                     raise error.Abort(mst[ctx.instabilities()[0]] % ctx)