li:{root} [root] FIRST te:{key1} LAST te:{backslash_braced_clo}
 te:{key1} {val1}
 te:{key2} {val2}
 te:{key3} {val3}
 te:{key4} {val4}
 te:{key5} {val5}
 te:{key6} {val6}
 te:{} {anon1}
 te:{} {anon2}
 te:{} {anon3}
 te:{empty} {}
 te:{empty2} {}
 te:{empty3} {}
 te:{} {}
 te:{} {}
 te:{backslash_literal_n} {foonbar}
 te:{backslash_literal_bsl} {foo\bar}
 te:{backslash_literal_col} {foo:bar}
 te:{backslash_literal_sem} {foo;bar}
 te:{backslash_literal_clo} {foo}bar}
 te:{backslash_braced_n} {foonbar}
 te:{backslash_braced_bsl} {foo\bar}
 te:{backslash_braced_col} {foo:bar}
 te:{backslash_braced_sem} {foo;bar}
 te:{backslash_braced_clo} {foo}bar}
