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

@@ -317,16 +317,19 @@ FString FlxBlueprintExporter::SanitizeName(const FString& Title)
 	bool PrevWasUnderscore = true; // suppress leading underscore
 	for (TCHAR Ch : Title)
 	{
-		if (FChar::IsAlnum(Ch))
+		if (FChar::IsWhitespace(Ch))
+		{
+			if (!PrevWasUnderscore)
+			{
+				Result += TEXT('_');
+				PrevWasUnderscore = true;
+			}
+		}
+		else
 		{
 			Result += Ch;
 			PrevWasUnderscore = false;
 		}
-		else if (!PrevWasUnderscore)
-		{
-			Result += TEXT('_');
-			PrevWasUnderscore = true;
-		}
 	}
 	// Trim trailing underscore
 	if (Result.Len() > 0 && Result[Result.Len() - 1] == TEXT('_'))