error Invalid tag name "–save-dev": Tags may not have any characters that encodeURIComponent encodes

error Invalid tag name "–save-dev": Tags may not have any characters that encodeURIComponent encodes

解决方法：

https://stackoverflow.com/questions/51912808/simple-explanation-of-einvalidtagname

npm install –save-dev gulp

改为：

npm install –-save-dev gulp