/loot doesn't parse slashes correctly without quotes

The bug

Unlike other commands such as {{/function}}, {{/loot}} fails to parse slashes correctly and requires identifiers that use them to be quoted.

How to reproduce

1. /function test/test
    → ✔ It correctly parses, but tells you the function was not found

2. /loot spawn ~ ~ ~ loot entities/pig
    → ❌ Syntax error

Also note that unlike in Java Edition, there are no command suggestions for loot tables in this command. This makes it impossible to determine what parameters are valid without an external resource.