Update ctaEngine.py
Update ctaEngine.py

Fix a typo
wisfern/vnpy,jiangjinjinyxt/vnpy,xcbat/vnpy,akeyong/vnpy,border/vnpy,rrrrrr8/vnpy,akeyong/vnpy,harveywwu/vnpy,rrrrrr8/vnpy,kernelmilowill/PDMQBACKTEST,harveywwu/vnpy,Chemcy/vnpy,andrewchenshx/vnpy,wisfern/vnpy,xcbat/vnpy,freeitaly/Trading-System,wisfern/vnpy,akeyong/vnpy,ujfjhz/vnpy,xcbat/vnpy,freeitaly/Trading-System,xcbat/vnpy,jiangjinjinyxt/vnpy,Chemcy/vnpy,lukesummer/vnpy,wylwang/vnpy,Chemcy/vnpy,lukesummer/vnpy,jiangjinjinyxt/vnpy,jiangjinjinyxt/vnpy,wisfern/vnpy,jiangjinjinyxt/vnpy,wylwang/vnpy,lukesummer/vnpy,border/vnpy,bigdig/vnpy,rrrrrr8/vnpy,andrewchenshx/vnpy,akeyong/vnpy,yongfuyang/vnpy,msincenselee/vnpy,wisfern/vnpy,msincenselee/vnpy,wylwang/vnpy,vnpy/vnpy,rrrrrr8/vnpy,freeitaly/Trading-System,msincenselee/vnpy,lukesummer/vnpy,rrrrrr8/vnpy,rrrrrr8/vnpy,kernelmilowill/PDMQBACKTEST,kernelmilowill/PDMQBACKTEST,harveywwu/vnpy,bigdig/vnpy,msincenselee/vnpy,andrewchenshx/vnpy,border/vnpy,akeyong/vnpy,harveywwu/vnpy,andrewchenshx/vnpy,wylwang/vnpy,ujfjhz/vnpy,Chemcy/vnpy,freeitaly/Trading-System,bigdig/vnpy,ujfjhz/vnpy,harveywwu/vnpy,freeitaly/Trading-System,yongfuyang/vnpy,lukesummer/vnpy,yongfuyang/vnpy,andrewchenshx/vnpy,wylwang/vnpy,ujfjhz/vnpy,wisfern/vnpy,yongfuyang/vnpy,xcbat/vnpy,yongfuyang/vnpy,border/vnpy,bigdig/vnpy,kernelmilowill/PDMQBACKTEST,vnpy/vnpy,harveywwu/vnpy,ujfjhz/vnpy,kernelmilowill/PDMQBACKTEST,border/vnpy,Chemcy/vnpy