Space a rewritten argument list the way it was written

[virzak]

Addresses most of #152, found in the code generated for SharpCompress now that it has adopted the generator.

Before

global::Helpers.StreamExtensions.WriteTo(stream,                         destination,
        4096,
        progress: progress)                    ;

After

global::Helpers.StreamExtensions.WriteTo(stream, destination,
        4096,
        progress: progress);

Three seams, three causes

1. Unwrapping rebuilt the argument list with fresh parentheses, losing the break after the opening one and the indentation before the closing one. The original parentheses are kept now. What trails the closing one is still dropped, because it described how the call sat in whatever contained it - which is exactly what unwrapping changes. Keeping it was what broke ConditionalExtensionTests.LongChained on my first attempt, stranding the ; on its own line.

2. The argument the receiver displaces is no longer first on its line, so indentation written to put it at the start of one only leaves a gap after the comma. Dropped when it is bare indentation; left alone when it still follows a break.

3. Dropping a trailing ConfigureAwait left whatever separated the call from the dot in front of the next token, usually the semicolon. When that is only whitespace it goes with the call. Anything else - a comment, a directive - was written about the expression which remains, so all of it is kept, rather than silently deleting something a person wrote.

Not fixed

The break which belongs before the first argument is still missing, so the receiver and the first argument share a line. That break is already gone from the tree by the time unwrapping runs - it is lost somewhere upstream - and finding where is a separate piece of work. #152 stays open for it, with the scope narrowed to that.

Verification

First commit records the current output; the second commit's diff is exactly what changed. Two snapshots move, both to the shape above. Everything else is untouched: 339 and 297 pass, all three Roslyn variants build.

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 93.75000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 93.90%. Comparing base (c949773) to head (773b680).

Files with missing lines	Patch %	Lines
...rc/Zomp.SyncMethodGenerator/AsyncToSyncRewriter.cs	93.75%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #154      +/-   ##
==========================================
- Coverage   93.92%   93.90%   -0.02%     
==========================================
  Files           9        9              
  Lines        1563     1576      +13     
  Branches      360      363       +3     
==========================================
+ Hits         1468     1480      +12     
  Misses         25       25              
- Partials       70       71       +1     

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