Method unindent

Source/ThirdParty/jsoncpp/src/lib_json/json_writer.cpp:579–582

void StyledWriter::indent() { indentString_ += JSONCPP_STRING(indentSize_, ' '); }

void StyledWriter::unindent() {
  assert(indentString_.size() >= indentSize_);
  indentString_.resize(indentString_.size() - indentSize_);
}

void StyledWriter::writeCommentBeforeValue(const Value& root) {
  if (!root.hasComment(commentBefore))