[llvm] [llvm] fix mustache template whitespace (PR #153724)

[Paul Kirth via llvm-commits]

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@@ -681,10 +685,59 @@ void ASTNode::renderChild(const json::Value &Contexts, llvm::raw_ostream &OS) {
     Child->render(Contexts, OS);
 }
 
+void ASTNode::indentTextNode(std::string &Body, size_t Indentation,
+                             bool FinalNode) {
+  std::string spaces(Indentation, ' ');
+  size_t pos = 0;
+  size_t LastChar = std::string::npos;
+
+  if (FinalNode)
+    // body.erase(body.find_last_not_of(" \t\r\f\v") + 1);
+    LastChar = Body.find_last_not_of(" \t\r\f\v");
+
+  while ((pos = Body.find('\n', pos)) != std::string::npos) {
+    if ((!FinalNode) || (pos != LastChar)) {
+      Body.insert(pos + 1, spaces);
+      pos += 1 + Indentation;
+    } else {
+      break;
+    }
+  }
+}
+
+void ASTNode::indentNodes(ASTNode *Node, bool isPartial) {
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ilovepi wrote:

nit: IsPartial

https://github.com/llvm/llvm-project/pull/153724