More minor fixes, execution no longer halts

- jessex(): Use `os.system` instead of `os.execl` (which replaced the socode.py process and stopped later functions from being run). Fixes the problem mentioned in 76ef6b
- GeneralZero(): Check that the function requires no arguments so that a TypeError is not thrown
- satshabad(): Added a newline
- borntyping(): Removed a character that should not be there