Software implementations are typically required to test names of
object members for equality. Implementations that transform the
textual representation into sequences of Unicode code units and then
perform the comparison numerically, code unit by code unit, are
interoperable in the sense that implementations will agree in all
cases on equality or inequality of two strings. For example,
implementations that compare strings with escaped characters
unconverted may incorrectly find that "a\\b" and "a\u005Cb" are not
equal.
RFCの文章をコピーした時に、先頭にスペースがあるのでこれが発現する