RCString.opEquals

assert(RCString("abc") == "abc");
assert(RCString("abc") != "Abc");
assert(RCString("abc") != "abd");
assert(RCString("abc") != "");
assert(RCString("") == "");

assert(RCString("abc") == RCString("abc"));
assert(RCString("abc") != RCString("Abc"));
assert(RCString("abc") != RCString("abd"));
assert(RCString("abc") != RCString(""));
assert(RCString("") == RCString(""));