examples: add an example configuration for go source files Tested by timeless. Differential Revision: https://phab.mercurial-scm.org/D7683

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

config: drop debug messages saying where config was read from `hg config --debug` includes lines like this: set config by: $EDITOR but also lines like this: $EDITOR: ui.editor=emacs -nw The `set config by` messages don't seem to provide much additional information over what we get from the `$EDITOR:`-type message. I could imagine wanting to see which values got overriden by a later entry, but that information is already not present. So let's just remove the first type of output. My next patch would otherwise amplify the redundant output (there would be one `set config by` for each line in `mergetools.rc`). Differential Revision: https://phab.mercurial-scm.org/D7627