I am realizing that my tutorials may be hundreds of lessons long. This makes for a very large markdown file. If I, or anyone, mistypes something - like forgetting a space when I want to omit the "short description", I get a generic error message...

TypeError: Cannot read property '0' of null
    at removeHash (/Users/tom/Documents/coderoad-tutorial-parser/tutorial-parser.js:6:58)
    at createLevel (/Users/tom/Documents/coderoad-tutorial-parser/tutorial-parser.js:98:19)
    at parseTutorial (/Users/tom/Documents/coderoad-tutorial-parser/tutorial-parser.js:160:30)
    at Object.<anonymous> (/Users/tom/Documents/coderoad-tutorial-parser/tutorial-parser.js:179:20)
    at Module._compile (internal/modules/cjs/loader.js:1158:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)
    at Module.load (internal/modules/cjs/loader.js:1002:32)
    at Function.Module._load (internal/modules/cjs/loader.js:901:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)
    at internal/main/run_main_module.js:18:47

I'm not having any problems, and I can handle finding an error like this. Just wanted to point it out. If the markdown file is huge, this may be challenging for some.