Using special characters in filtered strings

[Tomasz Kuchta]

Hi,

I got stuck with the following:

Imagine we have a string in stdout of a command that we would like to filter out:

Error123: some 'thing' (happened)

If we want to filter that out we would do something like

"{{ item.stderr.regex_replace('Error[0-9]+: some \\'thing\\' \\(happened\\)', '') }}"

However due to the fact that we have a colon, a single quote and brackets in our string I was unable to come up with the right escape sequence - whatever I tried, it always failed on one of these. 

What would be the right way to escape these special character when they are also used in 

the filter function like regex_replace?

Thanks!