Show unrecognized chord name instead of mangling the name with '?'

(I'm not sure if this is more of an issue with the SwiftlyChordUtilities dependency or Chord Provider itself, so feel free to move the issue)

I have a chordpro file which contains a Gadd4 chord (also known as Gadd11).

Since Chord Provider doesn't recognize this chord, I defined a chord chart + fingering for it:

{define: Gadd4 base-fret 1 frets 3 2 0 0 1 3 fingers 3 2 0 0 1 4}

Some [Gadd4]lyrics here

This rendered as:

G?*

in both the display and PDF output which was a surprise, since I expected this to display the chord name I wrote.

A quick fix might be just to add support for add4 chords. Looking at the way add9 is supported in SwiftlyChordUtilities, it appears like you explicitly added a case for Chord.Quality to cover addNine. Should there also be an addFour/addEleven?

Although thinking about this some more, add chords are just the major triad with an "added" interval above the root, so theoretically it would be possible to construct arbitrary add chords with intervals over the entire octave. However, the number of such chords is bounded if we assume we’re naming chords by “normalizing” the added interval within the octave (so add11 would be written as add4). So perhaps the path forward is to generalize add to allow for arbitrary intervals?

It seems reasonable that the chord database may not be exhaustive, but my main issue is that the name gets mangled in the display (and also PDF output). For chords that aren't recognized, could the original name be kept as-is instead of mangling the name?

Desbeers / Chord-Provider

Show unrecognized chord name instead of mangling the name with '?' #15