test: Improve govet log newline check

We don't match for log.Fatalf but we shouldn't really be using that.

test/test-govet.sh

@@ -72,7 +72,7 @@ done
 
 # loop through individual *.go files
 for file in `find . -maxdepth 3 -type f -name '*.go' -not -path './old/*' -not -path './tmp/*'`; do
-	run-test grep 'log.' "$file" | grep '\\n"' && fail_test 'no newline needed in log.Printf()'	# no \n needed in log.Printf()
+	run-test grep 'log.Print' "$file" | grep '\\n"' && fail_test 'no newline needed in log.Print*()'	# no \n needed in log.Printf or log.Println
 	run-test simplify-gocase "$file"
 	run-test token-coloncheck "$file"
 	run-test naked-error "$file"