@@ -2931,7 +2931,7 @@ inline bool is_field_value(const std::string &s) { return is_field_content(s); }
namespace detail {
inline bool is_hex(char c, int &v) {
if (0x20 <= c && isdigit(c)) {
if (isdigit(c)) {
v = c - '0';
return true;
} else if ('A' <= c && c <= 'F') {
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