Formatting rule improvements

[shenglol]

Updated two formatting rules based on user feedback. Main changes:

• The formatter no longer put if expression on a different line unless there is a single-line comment between = and if.
• If the last function argument ends with a multi-line object or array, the function argument list will not be forced to wrap, unless the width limit is exceeded. This happens to be a heuristic implemented by Prettier.

Closes #13676.

Microsoft Reviewers: Open in CodeFlow

[github-actions]

Test this change out locally with the following install scripts (Action run 8927734929)

VSCode

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-vsix.sh) --run-id 8927734929

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-vsix.ps1) } -RunId 8927734929"

Azure CLI

• Mac/Linux

  bash <(curl -Ls https://aka.ms/bicep/nightly-cli.sh) --run-id 8927734929

• Windows

  iex "& { $(irm https://aka.ms/bicep/nightly-cli.ps1) } -RunId 8927734929"

[github-actions]

Test Results

    66 files   -     33      66 suites   - 33   23m 16s ⏱️ - 7m 38s
10 876 tests  -     20  10 875 ✅  -     20  1 💤 ±0  0 ❌ ±0 
25 648 runs   - 12 820  25 646 ✅  - 12 819  2 💤  - 1  0 ❌ ±0 

Results for commit c273afb. ± Comparison against base commit 52025f9.

♻️ This comment has been updated with latest results.

[StephenWeatherford]

nit: "layout" is a noun, "lay out" is a verb. But it is a free country, so you decide.... :-)

[shenglol]

Yeah good catch. Will probably change all occurrence of Layout... to LayOut... in a separate PR.