I want the ability to paste the content of log files, but that also highlight certain sections of the log that are important (usually a word or two in a single line). A plaintext fenced codeblock works if I don't need highlights, but usually I do. Using a mark HTML tag in a blockquote works fairly well (by just starting the first line with a >). But, some logs may have empty lines and it's quite annoying to have to remove in long log snippets.
Is there a fenced codeblock that can just support some sort of plaintext with highlight? If not, would it be easy to build one as a plugin?