da4bbc4247
This PR introduces the `ReviewedOn` and `ReviewedBy` variables for the default merge message templates (e.g., `.gitea/default_merge_message/MERGE_TEMPLATE.md`). This allows customizing the default merge messages while retaining these trailers. This also moves the associated logic out of `pull.tmpl` into the relevant Go function. This is a first contribution towards #11077. --- For illustration, this allows to recreate the "default default" merge message with the following template: ``` .gitea/default_merge_message/MERGE_TEMPLATE.md Merge pull request '${PullRequestTitle}' (${PullRequestReference}) from ${HeadBranch} into ${BaseBranch} ${ReviewedOn} ${ReviewedBy} ```