Add support for , . Bug14.

bin/verilator

@@ -1554,7 +1554,7 @@ them with a $write with the appropriate format specifier.
 
 The rarely used optional parameter to $finish and $stop is ignored.
 
-=item $fopen, $fclose, $fdisplay, $feof, $fflush, $fgetc, $fgets, $fwrite
+=item $fopen, $fclose, $fdisplay, $feof, $fflush, $fgetc, $fgets, $fscanf, $fwrite
 
 File descriptors passed to the file PLI calls must be file descriptors, not
 MCDs, which includes the mode parameter to $fopen being mandatory.
@@ -1564,6 +1564,11 @@ are 32 bits while FILE*s may be 64 bits, the descriptor must be stored in a
 reg [63:0] rather than an integer.  The define `verilator_file_descriptor in
 verilated.v can be used to hide this difference.
 
+=item $fscanf, $sscanf
+
+Only integer formats are supported; %e, %f, %m, %r, %v, and %z are not
+supported.
+
 =item $fullskew, $hold, $nochange, $period, $recovery, $recrem, $removal,
 $setup, $setuphold, $skew, $timeskew, $width