@@ -2296,12 +2296,13 @@ Converter::GetCodeUnitArrayLiteral(const clang::StringLiteral *expr) {
       total = std::max(arr_ty->getSize().getZExtValue(), len);
     }
   }
-  std::string out = "[";
+  std::string out = '[';
   for (uint64_t i = 0; i < total; ++i) {
     out += std::format("{} as {}, ", i < len ? expr->getCodeUnit(i) : 0,
                        elem_type);
   }
-  return out + ']';
+  out += ']';
+  return out;
 }
 
 bool Converter::VisitStringLiteral(clang::StringLiteral *expr) {
Original file line number	Diff line number	Diff line change
`@@ -2296,12 +2296,13 @@ Converter::GetCodeUnitArrayLiteral(const clang::StringLiteral *expr) {`
`2296`	`2296`	`total = std::max(arr_ty->getSize().getZExtValue(), len);`
`2297`	`2297`	`}`
`2298`	`2298`	`}`
`2299`		`- std::string out = "[";`
	`2299`	`+ std::string out = '[';`
`2300`	`2300`	`for (uint64_t i = 0; i < total; ++i) {`
`2301`	`2301`	`out += std::format("{} as {}, ", i < len ? expr->getCodeUnit(i) : 0,`
`2302`	`2302`	`elem_type);`
`2303`	`2303`	`}`
`2304`		`- return out + ']';`
	`2304`	`+ out += ']';`
	`2305`	`+ return out;`
`2305`	`2306`	`}`
`2306`	`2307`
`2307`	`2308`	`bool Converter::VisitStringLiteral(clang::StringLiteral *expr) {`