[BUG] `az vmss update --help` is totally broken

[d-mankowski-synerise]

Describe the bug

Output of az vmss update --help looks like this (is almost 8k lines long):

Related command

az vmss update --help

Errors

no error is returned by az cli

Issue script & Debug output

az vmss update --help --debug, see vmss-update.txt

Expected behavior

normal --help output

Environment Summary

azure-cli                         2.66.0

core                              2.66.0
telemetry                          1.1.0

Extensions:
account                            0.2.5
aks-preview                      5.0.0b3
resource-graph                     2.1.0

Dependencies:
msal                              1.31.0
azure-mgmt-resource               23.1.1

Python location '/opt/homebrew/Cellar/azure-cli/2.66.0/libexec/bin/python'
Extensions directory '/Users/dmankows/.azure/cliextensions'

Python (Darwin) 3.12.7 (main, Oct  1 2024, 02:05:46) [Clang 16.0.0 (clang-1600.0.26.3)]

Legal docs and information: aka.ms/AzureCliLegal


Your CLI is up-to-date.

Additional context

No response

[yonzhan]

Thank you for opening this issue, we will look into it.

[bebound]

Fixed by #31687

[amcasey]

@bebound will the fix also help with az sf managed-application update --help?