mat: clarify that prefix is only added after the first line
MODIFY
mat/format.go
mat/format.go
@@ -36,7 +36,7 @@ type formatter struct {
type FormatOption func(*formatter)
// Prefix sets the formatted prefix to the string p. Prefix is a string that is prepended to
-// each line of output.
+// each line of output after the first line.
func Prefix(p string) FormatOption {
return func(f *formatter) { f.prefix = p }
}

mat: clarify that prefix is only added after the first line