In an interactive call, @var{count} is the numeric prefix argument.
-Self-insertion translates the input character through
-@code{translation-table-for-input}. @xref{Translation of Characters}.
-
This command calls @code{auto-fill-function} whenever that is
non-@code{nil} and the character inserted is in the table
@code{auto-fill-chars} (@pxref{Auto Filling}).