Makefile, main: fix tests

.travis.yml

@@ -2,9 +2,8 @@ language: go
 go_import_path: github.com/kevinburke/chroma-markdown
 
 go:
-  - 1.9.x
-  - 1.10.x
   - 1.11.x
+  - 1.12.x
   - master
 
 script: make test

Makefile

@@ -1,20 +1,14 @@
-MEGACHECK := $(GOPATH)/bin/megacheck
+STATICCHECK := $(GOPATH)/bin/staticcheck
 RELEASE := $(GOPATH)/bin/github-release
 
 UNAME := $(shell uname)
 
-$(MEGACHECK):
-ifeq ($(UNAME), Darwin)
-	curl --silent --location --output $(MEGACHECK) https://github.com/kevinburke/go-tools/releases/download/2018-11-18/megacheck-darwin-amd64
-endif
-ifeq ($(UNAME), Linux)
-	curl --silent --location --output $(MEGACHECK) https://github.com/kevinburke/go-tools/releases/download/2018-11-18/megacheck-linux-amd64
-endif
-	chmod 755 $(MEGACHECK)
+$(STATICCHECK):
+	go get honnef.co/go/tools/cmd/staticcheck
 
-vet: $(MEGACHECK)
+vet: $(STATICCHECK)
 	go list ./... | grep -v vendor | xargs go vet
-	go list ./... | grep -v vendor | xargs $(MEGACHECK)
+	go list ./... | grep -v vendor | xargs $(STATICCHECK)
 
 test: vet
 	go list ./... | grep -v vendor | xargs go test

main.go

@@ -145,7 +145,6 @@ func main() {
 	cmark, lookErr := exec.LookPath("cmark")
 	args := []string{cmark, "--unsafe", f.Name()}
 	if lookErr != nil {
-		args = args[:0]
 		cmark, lookErr = exec.LookPath("markdown")
 		checkError(lookErr, "finding markdown binary")
 		args = []string{cmark, f.Name()}