Erroneous interpretation of Na leads to width-zero mathematical symbols

[mardukbp]

According to the Unicode® Standard Annex #11 Na stands for narrow:

ED5. East Asian Narrow (Na): All other characters that are always narrow and have explicit fullwidth or wide counterparts. These characters are implicitly narrow in East Asian typography and legacy character sets because they have explicit fullwidth or wide counterparts. All of ASCII is an example of East Asian Narrow characters.

Therefore, the characters that are currently considered to belong to the nonassigned table should have width 1, not width 0.

Two of these characters are commonly used in quantum mechanics: |α⟩⟨α|

EDIT: This issue is fixed by #44. Please merge that PR.

[mardukbp]

#44 Has been merged. Therefore this issue can be closed.