Tweak buffer reservation in Util::format_hex

diff --git a/src/Util.cpp b/src/Util.cpp
index 9c12e342f3a6f99e13a58fd83598bd637d29dcf9..bfac8ebbef7379162948c33fad14f7dfcf9e8c42 100644 (file)
--- a/src/Util.cpp
+++ b/src/Util.cpp
@@ -271,7 +271,7 @@ std::string
 format_hex(const uint8_t* data, size_t size)
 {
   std::string result;
-  result.reserve(size);
+  result.reserve(2 * size);
   for (size_t i = 0; i < size; i++) {
     result += fmt::format("{:02x}", data[i]);
   }