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book: Print usage on invalid flags for seminar generator

parazyd 3 years ago
parent
commit
cdb19212f0
1 changed files with 1 additions and 1 deletions
  1. 1 1
      doc/generate_seminar_ics.py

+ 1 - 1
doc/generate_seminar_ics.py

@@ -141,4 +141,4 @@ if __name__ == "__main__":
         print_table()
         exit(0)
 
-    main()
+    usage()