tests/test-eol-tag.t

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

https://bz.mercurial-scm.org/2493

Testing tagging with the EOL extension

  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > eol =
  > 
  > [eol]
  > native = CRLF
  > EOF

setup repository

  $ hg init repo
  $ cd repo
  $ cat > .hgeol <<EOF
  > [patterns]
  > ** = native
  > EOF
  $ printf "first\r\nsecond\r\nthird\r\n" > a.txt
  $ hg commit --addremove -m 'checkin'
  adding .hgeol
  adding a.txt

Tag:

  $ hg tag 1.0

Rewrite .hgtags file as it would look on a new checkout:

  $ hg update -q null
  $ hg update -q

Touch .hgtags file again:

  $ hg tag 2.0

  $ cd ..