The one-line function signature — NAME(arg1, arg2, …) with the active argument emphasized and a
rest parameter expanded into its two slots. Extracted so the same rendering serves the collapsible
FunctionPreviewHeader and a future standalone tooltip (which would stack it over
FunctionPreviewContent). Presentational; nothing here mutates the edit.
The one-line function signature —
NAME(arg1, arg2, …)with the active argument emphasized and a rest parameter expanded into its two slots. Extracted so the same rendering serves the collapsible FunctionPreviewHeader and a future standalone tooltip (which would stack it over FunctionPreviewContent). Presentational; nothing here mutates the edit.