mpc-songs-hashcons

mpc-songs-hashcons is a variable defined in `mpc.el'.
Its value is

#s(hash-table size 65 test equal weakness key-and-value rehash-size 1.5 rehash-threshold 0.8 data
	      ())

Documentation:
Make song file name objects unique via hash consing.
This is used so that they can be compared with `eq', which is needed for
`text-property-any'.