Add description to hocrtotei

hocrtotei

@@ -5,15 +5,17 @@ from xml.sax.saxutils import escape
 import argparse
 import xml.etree.ElementTree as ET
 
-parser = argparse.ArgumentParser()
+parser = argparse.ArgumentParser(description='hocrtotei merges several hOCR files in order of their occurrence on command line to one TEI result file.')
 parser.add_argument(
     'i',
-    help='The input files.',
-    nargs='*',
+    metavar='hOCR-sourcefile',
+    help='Input file in hOCR file format.',
+    nargs='+'
 )
 parser.add_argument(
     'o',
-    help='The output file.',
+    metavar='TEI-destfile',
+    help='Output file.'
 )
 args = parser.parse_args()