Sorry for my unclear description — “28 июн.” means “June 27”, and “27 сент.” means “September 27”
It would be able to put new data on top, if Update Content action could insert new data into definite place (line number). Now Update Content action can replace all the data, or append at the end of file.
Jim, did you use TWO auxiliary files? — One for historical data , and another one for heading ?
Nope.
Given the simplicity of the task and the low overhead of plain text, I cached the prefixing text and the current text separately. Then I added them back together with the new data in between, and rewrote the entire file. Again, plain text = low hanging fruit, so not a performance problem.
Takes waaay more steps than other automation options, but it’s passable.
Here’s a link to the quickly composed shortcut: Split Example
Your solution reminded me film The Flying Scotsman (2006), where the main character told something like “Use what you have”.
Your solution is better than I expected from my suggestion! No need to care about line number — alter Markdown file as you need, just don’t touch first two strings of table.