docs: minor tracker-store man page cleanup
docs: minor tracker-store man page cleanup

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=675198

hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker