phases: ``{phase}`` template keyword display the phase name

 ``{phaseidx}`` is providing the phase index as integer. This integer
 representation is useful when people need to use the fact that phase are
 ordered.

Test keep using the number version for readability purpose.

mercurial/templatekw.py

@@ -276,7 +276,11 b' def shownode(repo, ctx, templ, **args):'
     return ctx.hex()
 
 def showphase(repo, ctx, templ, **args):
-    """:rev: Integer. The changeset phase."""
+    """:rev: String. The changeset phase name."""
+    return ctx.phasestr()
+
+def showphaseidx(repo, ctx, templ, **args):
+    """:rev: Integer. The changeset phase index."""
     return ctx.phase()
 
 def showrev(repo, ctx, templ, **args):
@@ -317,6 +321,7 b' keywords = {'
     'manifest': showmanifest,
     'node': shownode,
     'phase': showphase,
+    'phaseidx': showphaseidx,
     'rev': showrev,
     'tags': showtags,
 }

tests/test-phases-exchange.t

@@ -2,7 +2,7 b''
   > [extensions]
   > graphlog=
   > EOF
-  $ alias hgph='hg log --template "{rev} {phase} {desc} - {node|short}\n"'
+  $ alias hgph='hg log --template "{rev} {phaseidx} {desc} - {node|short}\n"'
 
   $ mkcommit() {
   >    echo "$1" > "$1"

tests/test-phases.t

@@ -1,4 +1,4 b''
-  $ alias hglog='hg log --template "{rev} {phase} {desc}\n"'
+  $ alias hglog='hg log --template "{rev} {phaseidx} {desc}\n"'
   $ mkcommit() {
   >    echo "$1" > "$1"
   >    hg add "$1"