indexamajig: Improve --help

src/indexamajig.c

@@ -102,11 +102,12 @@ static void show_help(const char *s)
 "                           '-' means stdin, which is the default.\n"
 "\n"
 "     --indexing=<method>  Use 'method' for indexing.  Choose from:\n"
-"                           none     : no indexing\n"
+"                           none     : no indexing (default)\n"
 "                           dirax    : invoke DirAx\n"
 "                           template : index by template matching\n"
 " -g. --geometry=<file>    Get detector geometry from file.\n"
 " -p, --pdb=<file>         PDB file from which to get the unit cell to match.\n"
+"                           Default: 'molecule.pdb'.\n"
 " -x, --prefix=<p>         Prefix filenames from input file with <p>.\n"
 "     --peaks=<method>     Use 'method' for finding peaks.  Choose from:\n"
 "                           zaef  : Use Zaefferer (2000) gradient detection.\n"