Word boundary detection for smiley codes

[Azareal]

We should use a more sophisticated smiley replacement mechanism where it only replaces traditional smiley codes with their associated emoji when the smiley is a standalone word rather than embedded inside something that might very well be a piece of code or something important.

[Azareal]

335fe4f#diff-e3dfe1200b7b31ab4817f18df3744d9bR405 If anyone wants to take it up, it might be a while before I get around to it. Preferably without regexes.

[SUP3RIA]

Quick fix: " :p " instead of ":p"

I can do it this weekend. My approach would be to use https://github.com/jdkato/prose#tokenizing for this.