split file command as it takes different args on macOS

pages/osx/file.md

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+# file
+
+> Determine file type.
+
+- Give a description of the type of the specified file. Works fine for files with no file extension:
+
+`file {{filename}}`
+
+- Look inside a zipped file and determine the file type(s) inside:
+
+`file -z {{foo.zip}}`
+
+- Allow file to work with special or device files:
+
+`file -s {{filename}}`
+
+- Don't stop at first file type match; keep going until the end of the file:
+
+`file -k {{filename}}`
+
+- Determine the mime encoding type of a file:
+
+`file -I {{filename}}`