message: Adds multi-line to FLatBufferToString
  Adding multi-line option to FlatBufferToString method in minireflect to allow more readable output for larger flatbuffers.
diff: @@ -283,13 +283,25 @@ inline void IterateFlatBuffer(const uint8_t *buffer,
  struct ToStringVisitor : public IterationVisitor {
  std::string s;
  - void StartSequence() { s += "{ "; }
  - void EndSequence() { s += " }"; }
  + std::string d;
  + ToStringVisitor(std::string delimiter): d(delimiter) {}
  +
  + void StartSequence() {
  + s += "{";
  + s += d;
  + }
  + void EndSequence() {
  + s += d;
  + s += "}";
  + }
  void Field(size_t /*field_idx*/, size_t set_idx, ElementaryType /*type*/,
  bool /*is_vector*/, const TypeTable * /*type_table*/,
  const char *name, const uint8_t *val) {
  if (!val) return;
  - if (set_idx) s += ", ";
  + if (set_idx) {
  + s += ",";
  + s += d;
  + }
  if (name) {
  s += name;
  s += ": ";
  @@ -326,8 +338,9 @@ struct ToStringVisitor : public IterationVisitor {
  };
  inline std::string FlatBufferToString(const uint8_t *buffer,
  - const TypeTable *type_table) {
  - ToStringVisitor tostring_visitor;
  + const TypeTable *type_table,
  + bool multi_line = false) {
  + ToStringVisitor tostring_visitor(multi_line ? "\n" : " ");
  IterateFlatBuffer(buffer, type_table, &tostring_visitor);
  return tostring_visitor.s;
  }
  