hdiutil: improve tokens (#3602)

pages/osx/hdiutil.md

@@ -4,11 +4,11 @@
 
 - Mount an image:
 
-`hdiutil attach {{filename}}`
+`hdiutil attach {{path/to/image_file}}`
 
 - Unmount an image:
 
-`hdiutil detach /Volumes/{{volumename}}`
+`hdiutil detach /Volumes/{{volume_name}}`
 
 - List mounted images:
 
@@ -16,4 +16,4 @@
 
 - Create an ISO image from the contents of a directory:
 
-`hdiutil makehybrid -o {{filename}} {{dirname}}`
+`hdiutil makehybrid -o {{path/to/output_file}} {{path/to/directory}}`