More formatter fixes

[petervdonovan]

This addresses some issues raised in lf-lang/playground-lingua-franca#48.

• Usually put the ending delimiter of a list on the same line as the last element of the list
• Do not always surround = signs with whitespace when they are in parameter lists
• Resolve the issues with bad wrapping of comments (EDIT: This implements the compromise suggested here.)
• Convert 4 spaces -> 2 spaces in {= =} code blocks (fixes Two-space indentation #1847)

EDIT: See lf-lang/playground-lingua-franca#50 to view the output of the formatter.

[cmnrd]

Looks good! So we now do change the indentation in the target code blocks as well? I guess it is safe most of the time, but I wonder if there might be some corner cases where we could break the target code. I guess we'll find out eventually 😄

[petervdonovan]

So we now do change the indentation in the target code blocks as well?

No, I did that using find-and- replace, not using the formatter.