Bounds error tokenizing reasonable string

[neelsmith]

This string throws

BoundsError: attempt to access SubString{String}

at index [0]

when tokenizing

"ὁ μὲν δή ὀβελὸς παρατίθεται πῥὸς ἀταίτησϊν ."

[neelsmith]

Happens when final punctuation separated by ws from previous lexical token; when ws is gone, no problems.

This fails:

"ὁ μὲν δή ὀβελὸς παρατίθεται πῥὸς ἀταίτησϊν ."

but this works

"ὁ μὲν δή ὀβελὸς παρατίθεται πῥὸς ἀταίτησϊν."

[neelsmith]

fixed.