Plotfile Tools: Add missing option to fcompare usage print (AMReX-Cod…

…es#3722)

This small PR just adds the `--abort_if_not_all_found` option to the
usage print out of `fcompare`.

Tools/Plotfile/fcompare.cpp

@@ -24,17 +24,18 @@ void PrintUsage()
         << " variable.\n"
         << "\n"
         << " usage:\n"
-        << "    fcompare [-n|--norm num] [-d|--diffvar var] [-z|--zone_info var] [-a|--allow_diff_grids] [-r|rel_tol] [--abs_tol] file1 file2\n"
+        << "    fcompare [-n|--norm num] [-d|--diffvar var] [-z|--zone_info var] [-a|--allow_diff_grids] [-r|rel_tol] [--abs_tol] [--abort_if_not_all_found] file1 file2\n"
         << "\n"
         << " optional arguments:\n"
-        << "    -n|--norm num         : what norm to use (default is 0 for inf norm)\n"
-        << "    -d|--diffvar var      : output a plotfile showing the differences for\n"
-        << "                            variable var\n"
-        << "    -z|--zone_info var    : output the information for a zone corresponding\n"
-        << "                            to the maximum error for the given variable\n"
-        << "    -a|--allow_diff_grids : allow different BoxArrays covering the same domain\n"
-        << "    -r|--rel_tol rtol     : relative tolerance (default is 0)\n"
-        << "    --abs_tol atol        : absolute tolerance (default is 0)\n"
+        << "    -n|--norm num            : what norm to use (default is 0 for inf norm)\n"
+        << "    -d|--diffvar var         : output a plotfile showing the differences for\n"
+        << "                               variable var\n"
+        << "    -z|--zone_info var       : output the information for a zone corresponding\n"
+        << "                               to the maximum error for the given variable\n"
+        << "    -a|--allow_diff_grids    : allow different BoxArrays covering the same domain\n"
+        << "    -r|--rel_tol rtol        : relative tolerance (default is 0)\n"
+        << "    --abs_tol atol           : absolute tolerance (default is 0)\n"
+        << "    --abort_if_not_all_found : abort if not all variables are present in both files\n"
         << std::endl;
 }