There are a few document properties (author, description, keywords) that should automatically be made meta tags if they exist on export. These were currently being checked as part of an and block that would evaluate both, creating the string, then just return a newline on success, meaning the meta tags were never added to the document (since they're part of a larger concat that never got the string added to it). This patch wraps the needed logic check into a when, then concats the tag creation and newline addition to return.
0001-ox-html.el-Fix-output-of-meta-tags-when-properties-a.patch
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