Removing-whitespace Questions

I haven't done a lot of work with regex, and i'm getting stuck. i'm trying to take a string and make it title case, but with some exceptions. i

Good evening, so i'm working on a shopify landing page for a client, and they want a contact form on the right-hand side of the content,

I should be able to do <p>{%- assign x = "aa, bb, cc" -%}{{- x -}}</p> and get aa,bb,cc as the