Partial / Invalid BibLaTeX Examples

• PrismJS version: 1.19.0
• PrismJS theme: okaidia

Example from Issue #3

@article{newpaper,
  title={

@article{existing,
  title={my old title}
}

Previously led to browser being stuck on an infinite loop.

Unsupported Nesting Depth

@article{nestingbelowlevel4,
  title={ l1 { l2 } l1 }
}

@article{nestingatlevel4,
  title={
    l1 { 
      l2 {
        l3 { l4 } l3
      } l2
    } l1
  }
}

@article{nestingabovelevel4,
  title={
    l1 { l2 { l3 { l4 {
      l5
    } l4 } l3 } l2 } l1
  }
}