cmdutil: factor out helper to create changeset_templater with literal template changeset_templater has lots of arguments, but most callers only need to specify a literal template 'tmpl'. "hg debugtemplate" has no diff option, which means 'opts' were effectively {}, so dropped opts.

test-dirstate-race: stabilize for Windows Without quoting, the output after "custom merge tool" in the next test is an abort trying to open "C:UsersMattAppData..."

formatter: document lookuptemplate()

cmdutil: rename gettemplate() to _lookuplogtemplate() This function is only useful when processing log options.

formatter: inline gettemplater() Since it's highly use-case dependent how template should be looked up, gettemplater() function isn't useful. Keeping it would introduce another bug I've made and fixed earlier in this series.

formatter: factor out function to create templater from literal or map file (tmpl, mapfile) will be packed into a named tuple later.

graphlog: do not look up graphnodetemplate in template paths (BC) ui.graphnodetemplate config should be a literal template as ui.logtemplate is. The use of formatter.gettemplater() is valid only for a template string given by -T/--template option.

formatter: open raw template file in posix semantics This should have no effect, but seems good for code consistency.

formatter: open raw template file in binary mode (BC) I believe it was a mistake to open file in text mode. Now '\r' is preserved on Windows, but it should be okay to print '\r\n' as long as users live in such platform.

formatter: close raw template file explicitly