Fix formatting for comma-separated arguments list

[shenglol]

Discovered a bug while experimenting with comment formatting. If a line comment is present within the argument list of a function call or within other variable block syntax structures, formatting the code will unintentionally add a comma after the comment. This PR fixes it.

Microsoft Reviewers: Open in CodeFlow

[github-actions]

Test this change out locally with the following install scripts (Action run 8145167344)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 8145167344

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 8145167344"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 8145167344

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 8145167344"

[github-actions]

Test Results

    66 files   -    32      66 suites   - 32   22m 10s ⏱️ - 21m 43s
10 670 tests  -    15  10 669 ✅  -    15  1 💤 ±0  0 ❌ ±0 
25 230 runs   - 9 797  25 228 ✅  - 9 796  2 💤  - 1  0 ❌ ±0 

Results for commit 2775e17. ± Comparison against base commit 8717dd5.