you name a folder in the array, then it will also include the files
inside that folder. (Unless they would be ignored by another rule.)
-You can also provide a ".npmignore" file in the root of your package,
-which will keep files from being included, even if they would be picked
-up by the files array. The ".npmignore" file works just like a
-".gitignore".
+You can also provide a ".npmignore" file in the root of your package or
+in subdirectories, which will keep files from being included, even
+if they would be picked up by the files array. The `.npmignore` file
+works just like a `.gitignore`.
Certain files are always included, regardless of settings: