You have used like this,

Copy from

/vendor/magento/module-wishlist/view/frontend/templates/link‌​.phtml

to

/app/design/frontend/{namespace}/{theme}/Magento_Wishlist/templates/link.phtml

You have used like this,

Copy from

/vendor/magento/module-wishlist/view/frontend/templates/link‌​.phtml

to

/app/design/frontend/{namespace}/{theme}/Magento_Wishlist/templates/link.phtml

Magento_Wishlist instead of module-wis‌​hlist.

or

don't need to use view/frontend after Magento_Wishlist.