Master sections and passages

An empty name for a section or passage creates a “master”, which is triggered for every section or passage in the game. (A master passage defined in a named section will only be triggered for every passage in that section)

e.g. to clear the screen before every section, and to increase a global turn counter:

[[]]:
@clear
@inc turns
    if (squiffy.get("turns") > 5) ...

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