Fix some issues with blueprint exporter

CLAUDE.md

@@ -105,6 +105,10 @@ Blueprints are automatically exported to readable text files in `Saved/Blueprint
 - `Docs/Difference Transmission with Threads.md` — why concurrent diff transmission is hard
 - `Docs/Blueprint Text Export.md` — how blueprints are auto-exported to readable text
 
+## Git
+
+Do not use git to make changes (commit, push, branch, etc.). Read-only git commands (status, log, diff, etc.) are fine.
+
 ## Coding Conventions
 
 - Do not use static functions in Unreal code. Use class methods or namespace-scoped functions instead.

Source/Integration/BlueprintExporter.cpp

@@ -317,17 +317,20 @@ FString FlxBlueprintExporter::SanitizeName(const FString& Title)
 	bool PrevWasUnderscore = true; // suppress leading underscore
 	for (TCHAR Ch : Title)
 	{
-		if (FChar::IsAlnum(Ch))
+		if (FChar::IsWhitespace(Ch))
 		{
-			Result += Ch;
-			PrevWasUnderscore = false;
-		}
-		else if (!PrevWasUnderscore)
+			if (!PrevWasUnderscore)
 			{
 				Result += TEXT('_');
 				PrevWasUnderscore = true;
 			}
 		}
+		else
+		{
+			Result += Ch;
+			PrevWasUnderscore = false;
+		}
+	}
 	// Trim trailing underscore
 	if (Result.Len() > 0 && Result[Result.Len() - 1] == TEXT('_'))
 	{