+ /* Look through the string for the first thing that looks like a
+ * decimal point: either the value in the current locale or the
+ * standard fallback of '.'. The one which appears earliest in the
+ * input string is the one that we should have atof look for. Note that
+ * we have to determine this beforehand because on some systems,
+ * Perl_atof2 is just a wrapper around the system's atof. */