Makefile: add some spacing

Makefile

@@ -5,21 +5,29 @@ ifdef CIRCLE_ARTIFACTS
 endif
 
 all: test cover
+
 fmt:
 	find . -not -path "./vendor/*" -name '*.go' -type f | sed 's#\(.*\)/.*#\1#' | sort -u | xargs -n1 -I {} bash -c "cd {} && goimports -w *.go && gofmt -w -s -l *.go"
+
 test:
 	if [ ! -d coverage ]; then mkdir coverage; fi
 	go test -v ./mpd -race -cover -coverprofile=$(COVERAGEDIR)/mpd.coverprofile
+
 cover:
 	go tool cover -html=$(COVERAGEDIR)/mpd.coverprofile -o $(COVERAGEDIR)/mpd.html
+
 tc: test cover
+
 coveralls:
 	gover $(COVERAGEDIR) $(COVERAGEDIR)/coveralls.coverprofile
 	goveralls -coverprofile=$(COVERAGEDIR)/coveralls.coverprofile -service=circle-ci -repotoken=$(COVERALLS_TOKEN)
+
 clean:
 	go clean
 	rm -rf coverage/
+
 examples-live:
 	go run examples/live.go
+
 examples-ondemand:
 	go run examples/ondemand.go