Problem
During the adoption of Mmark for math posts on this blog, I had to
insert markup: mmark at the last line of front matter of the source file
of each math post.
Seek help
I separated this into two SO questions
- Sed conditional match and execute command with offset, and
- A question about AWK multiple line recognition.
Solution
From #1., I learnt the use of variables in AWK scripts. From #2, some users explained how these variables can be used for multi-line regex search.
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