Format a mystery / mystical-ability level as static text: an em dash when the level is disabled (no base level), otherwise the value — optionally signed (mysteries display a signed level; abilities a plain one).
Whether the level is disabled.
The effective level value.
Formatting options.
Optional
When true, prefix non-negative values with +.
true
+
The formatted level string.
Format a mystery / mystical-ability level as static text: an em dash when the level is disabled (no base level), otherwise the value — optionally signed (mysteries display a signed level; abilities a plain one).