Solved
Assign a value of a variable, back to the variable
I want to assign the value of this replaced value back to the same variable.
{%= replaceAll(itin_1_img_alt,"-"," ") %}
something like,
{% let itin_1_img_alt = "This-is-my-ALT-tag" %}
{% itin_1_img_alt = replaceAll(itin_1_img_alt,"-"," ") %}
Thanks,