refactor: remove unnecessary newlines within XML documentation of generated code

[vbreuss]

This PR refactors the source generator code to remove unnecessary newlines within XML documentation comments of generated code. The changes improve the formatting and readability of the generated documentation.

Key Changes:

• Removed extra AppendLine() calls that created blank lines within XML documentation comments
• Fixed a typo in parameter documentation (changed double period ".." to single period ".")

[Copilot]

Pull request overview

This PR refactors the source generator code to remove unnecessary newlines within XML documentation comments of generated code. The changes improve the formatting and readability of the generated documentation.

Changes:

• Removed extra AppendLine() calls that created blank lines within XML documentation comments
• Fixed a typo in parameter documentation (changed double period ".." to single period ".")

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Test Results

    14 files  ±0      14 suites  ±0   5m 41s ⏱️ -44s
 2 301 tests ±0   2 300 ✅ ±0  1 💤 ±0  0 ❌ ±0 
15 412 runs  ±0  15 411 ✅ ±0  1 💤 ±0  0 ❌ ±0 

Results for commit a5aebcc. ± Comparison against base commit e486de5.

[github-actions]

🚀 Benchmark Results

Details

BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.3 LTS (Noble Numbat)

AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores

.NET SDK 10.0.102

[Host] : .NET 10.0.2 (10.0.2, 10.0.225.61305), X64 RyuJIT x86-64-v3
Job=InProcess  Toolchain=InProcessEmitToolchain  IterationCount=15

LaunchCount=1  WarmupCount=10

Method	Mean	Error	StdDev	Gen0	Gen1	Allocated
Simple_Mockolate	1.543 μs	0.0138 μs	0.0116 μs	0.2270	-	3.73 KB
Simple_Moq	180.246 μs	0.9724 μs	0.9096 μs	0.4883	-	14.55 KB
Simple_NSubstitute	5.984 μs	0.0706 μs	0.0626 μs	0.5569	0.0076	9.14 KB
Simple_FakeItEasy	6.537 μs	0.0162 μs	0.0135 μs	0.4959	-	8.11 KB

[github-actions]

This is addressed in release v1.0.1.