Ensure that max-line-length works from the command-line

When using `lein bikeshed -m 1000` from the terminal I get the following:

```
Checking for lines longer than 1000 characters.Exception in thread "main" java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Number
	at clojure.lang.Numbers.inc(Numbers.java:110)
	at bikeshed.core$long_lines.doInvoke(core.clj:55)
	at clojure.lang.RestFn.invoke(RestFn.java:439)
	at bikeshed.core$bikeshed.doInvoke(core.clj:153)
	at clojure.lang.RestFn.invoke(RestFn.java:423)
	at user$eval516.invoke(form-init8153822776944165599.clj:1)
	at clojure.lang.Compiler.eval(Compiler.java:6619)
	at clojure.lang.Compiler.eval(Compiler.java:6609)
	at clojure.lang.Compiler.load(Compiler.java:7064)
	at clojure.lang.Compiler.loadFile(Compiler.java:7020)
	at clojure.main$load_script.invoke(main.clj:294)
	at clojure.main$init_opt.invoke(main.clj:299)
	at clojure.main$initialize.invoke(main.clj:327)
	at clojure.main$null_opt.invoke(main.clj:362)
	at clojure.main$main.doInvoke(main.clj:440)
	at clojure.lang.RestFn.invoke(RestFn.java:421)
	at clojure.lang.Var.invoke(Var.java:419)
	at clojure.lang.AFn.applyToHelper(AFn.java:163)
	at clojure.lang.Var.applyTo(Var.java:532)
	at clojure.main.main(main.java:37)
Subprocess failed
```

These two commits solve this exception and also tidies up the formatting of the first line.