Fix wrap_error_in generation for TS client

[rogebrd]

Checklist

General Contributing

• Have you read the Code of Conduct and signed the CLA?

Is This a Code Change?

• Non-code related change (markdown/git settings etc)
• Code Change
• Example/Test Code Change

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[codecov]

Codecov Report

Merging #240 (8af1b73) into main (191bdb1) will not change coverage.
The diff coverage is n/a.

❗ Current head 8af1b73 differs from pull request most recent head f99cf85. Consider uploading reports for the commit f99cf85 to get more accurate results

@@           Coverage Diff           @@
##             main     #240   +/-   ##
=======================================
  Coverage   51.65%   51.65%           
=======================================
  Files          37       37           
  Lines        8393     8393           
  Branches     1790     1790           
=======================================
  Hits         4335     4335           
  Misses       3744     3744           
  Partials      314      314           

Flag	Coverage Δ
unit	51.65% <ø> (ø)

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Impacted Files	Coverage Δ
stone/backends/tsd_client.py	55.31% <ø> (ø)

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