*
* The available "test" conditions are as follows:
*
- * '0': check against the line being empty (not even containing a \n char)
+ * '0': check for "line" not being empty (not even containing a \n char)
* 'n': check for "line" ending with an \n char
* 'e': check for "line" starting with an \n char
* 'f': check for "line" not starting with an \n char