Allow C++, .NET, version numbers (2.0.1) in wiki filenames.
Clean up isolated plus signs that appear between hyphens.
Examples:
- C++ vs C# -> C++-vs-C.md
- .NET Guide -> .NET-Guide.md
- version 2.0.1 -> version-2.0.1-release.md
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>