namespace: introduce logfmt to show l10n-ed messages for hg log correctly Before this patch, "_()" is used incorrectly for "tag:" and "bookmark:" fields. "changeset_printer()" looks up keys composed at runtime, and it prevents "xgettext" command from getting strings to be translated from source files. Then, *.po files merged with updated "hg.pot" lose msgids for "tag:" and "bookmark:". This patch introduces "logfmt" information into "namespace" to show l10n-ed messages "hg log" (or "changeset_printer()") correctly. For similarity to other namespaces, this patch specifies "logfmt" for "branches" namespace, even though it isn't needed (branch information is handled in "changeset_printer()" specially). To find related code paths out easily, this patch adds "i18n: column positioning ..." comment to the line composing "logfmt" by default, even though this line itself doesn't contain any strings to be translated.

osutil: fix memory leak of PyBytes of path in statfiles Spotted with cpychecker.

revert: move prefetch to after the actions logic The prefetch logic came before the actual population of the actions collection, so it was always being passed an empty action list. This fixes it by moving it to after that logic. The only consumer of this function at the moment is remotefilelog, and I verified it works with this change.