Query with plus signs not working

[tsalo]

I'm trying to collect the MNIInfant-to-MNI152NLin6Asym transform for a specific MNIInfant cohort, but when I include + in the query, no files are collected. When I don't include the + symbol and just have the template name (MNIInfant), all of the cohort-wise transforms are collected.

import templateflow

print(templateflow.__version__)
# 25.0.1

print(len(templateflow.api.get('MNI152NLin6Asym', **{'from': 'MNIInfant', 'suffix': 'xfm'})))
# 11 (all of the cohort-specific MNIInfant transforms)

print(len(templateflow.api.get('MNI152NLin6Asym', **{'from': 'MNIInfant+10', 'suffix': 'xfm'})))
# 0 (no transforms collected)

Related to PennLINC/xcp_d#1487.