Created About Slugs (markdown)

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 This is a term which comes up a lot in Crafting Guide, so it's best to be clear about these up front.  A slug is a version of a thing's name which has any troublesome characters removed, and which has been cleaned up for easy use in programs.  These are generally created with the following steps:
 1. Replace any non-alphanumeric character with an `_`
 2. Replace any duplicated `_` with a single one
 3. Remove any `_` at the start or end of the slug.
 4. Convert all letters to lowercase.
 In other words, you'd convert something like "Oak Wood Planks" to "oak_wood_planks" or "(Empty) Fuel Can" to "empty_fuel_can".