@table @code
@item -d,--diff-version-update
increase the @code{\version} string only if the file has actually
-been changed. Without this option (or when any conversion has
-changed the file), the version header reflects the last considered
-conversion rule.
+been changed. In that case, the version header will correspond to
+the version after the last actual change. Without that option,
+the version will reflect the last @emph{attempted} conversion.
@item -e,--edit
Apply the conversions direct to the input file, modifying it