hgweb: use sysstr to get attribute on diff option
Attribute identifier should be `str` not `bytes`.
$ . "$TESTDIR/narrow-library.sh"
create full repo
$ hg init master
$ cd master
$ mkdir inside
$ echo inside > inside/f1
$ mkdir outside
$ echo outside > outside/f2
$ hg ci -Aqm 'initial'
$ hg mv outside/f2 inside/f2
$ hg ci -qm 'move f2 from outside'
$ echo modified > inside/f2
$ hg ci -qm 'modify inside/f2'
$ mkdir outside
$ echo new > outside/f3
$ hg ci -Aqm 'add outside/f3'
$ cd ..
$ hg clone --narrow ssh://user@dummy/master narrow --include inside -r 2
adding changesets
adding manifests
adding file changes
added 3 changesets with 3 changes to 2 files
new changesets *:* (glob)
updating to branch default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd narrow
$ hg co 'desc("move f2")'
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg status
$ hg diff
$ hg diff --change . --git
diff --git a/inside/f2 b/inside/f2
new file mode 100644
--- /dev/null
+++ b/inside/f2
@@ -0,0 +1,1 @@
+outside
$ hg log --follow inside/f2 -r tip
changeset: 2:bcfb756e0ca9
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: modify inside/f2
changeset: 1:5a016133b2bb
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: move f2 from outside
$ echo new > inside/f4
$ hg ci -Aqm 'add inside/f4'
$ hg pull -q
$ hg --config extensions.rebase= rebase -d tip
rebasing 3:4f84b666728c "add inside/f4"
saved backup bundle to $TESTTMP/narrow/.hg/strip-backup/4f84b666728c-4269b76e-rebase.hg
$ hg co -q 0
$ echo modified > inside/f1
$ hg ci -qm 'modify inside/f1'
$ echo new > inside/f5
$ hg ci -Aqm 'add inside/f5'
$ hg --config extensions.rebase= rebase -d 'public()' -r .
rebasing 6:610b60178c28 tip "add inside/f5"
saved backup bundle to $TESTTMP/narrow/.hg/strip-backup/610b60178c28-65716a78-rebase.hg