PyQuil v4 RC53 inconsistent spacing in DEFGATE expression math

[mhodson-rigetti]

Pre-Report Checklist

• [x] I am running the latest versions of pyQuil and the Forest SDK
• [x] I checked to make sure that this bug has not already been reported

Issue Description

After parsing and then outputting the following Program:

DEFGATE SQRT-X:
    0.5+0.5i, 0.5-0.5i
    0.5-0.5i, 0.5+0.5i

... the output renders the first line as 0.5+0.5i, 0.5 - 0.5i, and similarly for the second.

The spacing around the + and - operators appears to be inconsistent; the - operator has encapsulating spaces.

This issue manifests in pyquil but it's entirely likely the source is quil-rs.