Fix linting (#6123) #1286

Job	Run time
Check Python types	3m 5s
Lint	1m 41s
Test Positron IPyKernel (macos-latest, 3.9)	2m 12s
Python Tests (ubuntu-latest, 3.8)	1m 41s
Test Positron IPyKernel (windows-latest, 3.10)	8m 16s
Python Tests (ubuntu-latest, 3.13)	1m 54s
Test Minimum Positron IPyKernel Dependencies (ubuntu-latest, 3.8)	4m 31s
Test Positron IPyKernel (ubuntu-latest, 3.11)	2m 40s
Test TypeScript (ubuntu-latest, 3.x, ts-unit)	3m 14s
Test Positron IPyKernel (ubuntu-latest, 3.12)	2m 49s
Test TypeScript (ubuntu-latest, 3.x, functional)	2m 24s
Test TypeScript (macos-latest, 3.x, ts-unit)	2m 49s
Test TypeScript (macos-latest, 3.x, venv)	3m 51s
Test TypeScript (macos-latest, 3.x, single-workspace)	3m 15s
Test Positron IPyKernel (ubuntu-latest, 3.13)	2m 54s
Test TypeScript (macos-latest, 3.x, debugger)	2m 23s
Test TypeScript (macos-latest, 3.x, functional)	1m 43s
Test TypeScript (macos-latest, 3.x, smoke)	3m 26s
Test TypeScript (windows-latest, 3.x, ts-unit)	6m 35s
Test TypeScript (windows-latest, 3.x, functional)	5m 34s
	1h 6m 57s

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