Unexpected parsing with single characters such as *

I'm trying to use an asterisk in my string but it makes everything after is _Italic_. I believe this behaviour is unexpectes.

Input:
```
This string has something *important, so I use an asterisk.
```

Expected:
This string has something *important, so I use an asterisk.

Actual:
This string has something *_important, so I use an asterisk._

If this behaviour is expected I then one should resort to escaping the said character, however this also produces an undesirable result.

Input:
```
This string has something \*important, so I use an asterisk.
```

Expected:
This string has something *important, so I use an asterisk.

Actual:
This string has something \\*important, so I use an asterisk.

Empieza reproduciendo las dos entradas mostradas en el issue y compara cómo el parser maneja un asterisco sin pareja con su forma escapada con backslash. Se considera terminado cuando un asterisco aislado permanece literal y escaparlo produce un único asterisco literal, coincidiendo con la salida esperada indicada.

Escrito por el modelo de indexación a partir del texto del issue.