Drill zero suppression parsing issue (?)

[Gianarci]

Hi,

looks like that many drill files have rendering issue. I believe that mostly are due to wrong number format identification. I see the following code inside the file src/syntax/drill.ts at line 37 (5.0.0-alpha version) that is weird for me:

const zeroSuppression = tokens
      .filter(t => t.type === Lexer.DRILL_ZERO_INCLUSION)
      .map(t => {
        if (t.value === 'LZ') return Constants.TRAILING
        if (t.value === 'TZ') return Constants.LEADING
        return null
      })

Is that correct? When t.value is 'LZ' we return TRAILING... it shouldn't be LEADING?

I've a drill file with "METRIC,TZ" but the rendering is completely wrong. I tried to change it to "METRIC,LZ" and then the rendering of drills is ALMOST correct! There's only an issue with G93X0Y0 that is interpreted as a hole (I've already seen this bug opened #353).
Other file with "INCH,TZ" renders correctly so I don't know if such condition should be inverted or if it's a problem only with "METRIC,TZ"...