fixed typo and lint errors

daemon/core/core.go

@@ -1,7 +1,6 @@
 package core
 
 import (
-	"fmt"
 	"os"
 	"os/exec"
 	"os/user"
@@ -13,10 +12,12 @@ const (
 	defaultTrimSet = "\r\n\t "
 )
 
+// Trim remove trailing spaces from a string.
 func Trim(s string) string {
 	return strings.Trim(s, defaultTrimSet)
 }
 
+// Exec spawns a new process and reurns the output.
 func Exec(executable string, args []string) (string, error) {
 	path, err := exec.LookPath(executable)
 	if err != nil {
@@ -26,18 +27,19 @@ func Exec(executable string, args []string) (string, error) {
 	raw, err := exec.Command(path, args...).CombinedOutput()
 	if err != nil {
 		return "", err
-	} else {
-		return Trim(string(raw)), nil
 	}
+	return Trim(string(raw)), nil
 }
 
+// Exists checks if a path exists.
 func Exists(path string) bool {
 	if _, err := os.Stat(path); os.IsNotExist(err) {
 		return false
 	}
 	return true
 }
 
+// ExpandPath replaces '~' shorthand with the user's home directory.
 func ExpandPath(path string) (string, error) {
 	// Check if path is empty
 	if path != "" {