util: move common proxyobserver attributes to the base class
Fixes the following pytype warnings:
line 791, in _writedata: No attribute 'logdata' on baseproxyobserver [attribute-error]
line 792, in _writedata: No attribute 'logdataapis' on baseproxyobserver [attribute-error]
line 793, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 794, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 799, in _writedata: No attribute 'logdataapis' on baseproxyobserver [attribute-error]
line 800, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 802, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 803, in _writedata: No attribute 'name' on baseproxyobserver [attribute-error]
line 805, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 809, in _writedata: No attribute 'logdataapis' on baseproxyobserver [attribute-error]
line 810, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 814, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
line 815, in _writedata: No attribute 'name' on baseproxyobserver [attribute-error]
line 817, in _writedata: No attribute 'fh' on baseproxyobserver [attribute-error]
Differential Revision: https://phab.mercurial-scm.org/D7675
$ hg init r1
$ cd r1
$ hg ci --config ui.allowemptycommit=true -m c0
$ hg ci --config ui.allowemptycommit=true -m c1
$ hg ci --config ui.allowemptycommit=true -m c2
$ hg co -q 0
$ hg ci --config ui.allowemptycommit=true -m c3
created new head
$ hg co -q 3
$ hg merge --quiet
$ hg ci --config ui.allowemptycommit=true -m c4
$ hg log -G -T'{desc}'
@ c4
|\
| o c3
| |
o | c2
| |
o | c1
|/
o c0
>>> from mercurial import hg
>>> from mercurial import ui as uimod
>>> repo = hg.repository(uimod.ui())
>>> for anc in repo.changelog.ancestors([4], inclusive=True):
... print(anc)
4
3
2
1
0