corrected error commands

pman.sh

@@ -14,7 +14,7 @@ check_sudo() {
     if command -v "sudo" &>/dev/null; then
       command="sudo $command"
     else
-      echo "sudo command needed but not found" > /dev/stderr
+      echo "\`sudo\` command needed but not found" >&2
       exit 1
     fi
   fi
@@ -42,7 +42,7 @@ elif [ "$command_args" = "reflector" ]; then
   command_args=$(cat /etc/pacman.d/mirrorlist 2>/dev/null | grep -e "With.*reflector" | sed 's/#.*reflector //')
   # Check if reflector was actually used to generate the mirrorlist
   if [ "$command_args" = "" ]; then
-    echo "Error: reflector was not used to generate mirrorlist or mirrorlist location differ from standard"
+    echo "Error: reflector was not used to generate mirrorlist or mirrorlist location differ from standard" >&2
     exit 1
   fi
   su_needed=true