Splitting 'character code strings' into individual characters in QM

[linkiddx]

I need to transform "[65]" string into "[ 65]" in QM.
But QM interprets "[65]" as character code for 'A', not as "[" + "6" + "5" + "]" sequence.
So, this simple code doesn't work:
 

Code:

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_s = "[65]"
_s.replacerx("\[" "[ ")

But how do I get "[ 65]" from "[65]" then?
Is there any way of spliting 'character code strings' into individual characters?

Thanks for the answer!

[Gintaras]

Code:

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_s = "[91]65]" ;;91 is character code of '['
out _s

[linkiddx]

Thank you for your answer!

Actually, I know how to use escape characters and character codes in regular expressions.
Still, this one doesn't work for me.

For example, i need to transform "[65]: example string" into "[ 65]: example string".
"[65]" substring is not character code for 'A' in this case, it's just a text string.

The question remains to be answered:
How do I change "[65]: example string" into "[ 65]: example string" using regular expressions?

[Gintaras]

In this case your replacerx code works. But you can use [91] in regex string too if need.

Code:

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_s = "[91]65]: example string"
_s.replacerx("\[" "[ ")
out _s