logcmdutil: use the same data as {file*} template keywords (issue6642)

Since 0c72eddb4be5 template keywords that show files use a different source of
data than ctx.p1().status(ctx). These two functions in logcmdutil also show
file lists when needed (e.g. log with --debug flag), but previously they used
the old way of just looking at status compared to p1 and it resulted in
differences between e.g. hg log --debug and hg log -T '{file*}'.

test-phases.t needs an adjustment because 7 is a merge commit of two
topological branches and one of them introduces files C, D and E.

mercurial/logcmdutil.py

@@ -377,10 +377,9 b' class changesetprinter(object):'
         self._exthook(ctx)
 
         if self.ui.debugflag:
-            files = ctx.p1().status(ctx)
             for key, value in zip(
                 [b'files', b'files+', b'files-'],
-                [files.modified, files.added, files.removed],
+                [ctx.filesmodified(), ctx.filesadded(), ctx.filesremoved()],
             ):
                 if value:
                     self.ui.write(
@@ -512,11 +511,10 b' class changesetformatter(changesetprinte'
             or b'added' in datahint
             or b'removed' in datahint
         ):
-            files = ctx.p1().status(ctx)
             fm.data(
-                modified=fm.formatlist(files.modified, name=b'file'),
-                added=fm.formatlist(files.added, name=b'file'),
-                removed=fm.formatlist(files.removed, name=b'file'),
+                modified=fm.formatlist(ctx.filesmodified(), name=b'file'),
+                added=fm.formatlist(ctx.filesadded(), name=b'file'),
+                removed=fm.formatlist(ctx.filesremoved(), name=b'file'),
             )
 
         verbose = not self.ui.debugflag and self.ui.verbose

tests/test-issue6642.t

@@ -25,11 +25,9 b' https://bz.mercurial-scm.org/show_bug.cg'
   
 
   $ hg log -r . --debug | grep files
-  files+:      b (known-bad-output !)
-  [1] (missing-correct-output !)
+  [1]
   $ hg log -r . --debug -T json | egrep '(added|removed|modified)'
-    "added": ["b"], (known-bad-output !)
-    "added": [], (missing-correct-output !)
+    "added": [],
     "modified": [],
     "removed": [],
   $ hg log -r . --debug -T xml | grep path

tests/test-phases.t

@@ -407,7 +407,6 b' test that phase are displayed in log at '
   manifest:    7:5e724ffacba267b2ab726c91fc8b650710deaaa8
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
-  files+:      C D E
   extra:       branch=default
   description:
   merge B' and E