The maximum length of a prompt string is 511 characters.
If a longer prompt is set it will be silently truncated to the first 511 symbols.
The dollar codes each count as 1 character.
测试 :
OK : 小于 511 Chars
prompt %time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%234$p$g
NG : 大于 511 Chars
prompt %time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%time%%234$p$g