Space after slashes for comments. (arduino#716)

Co-authored-by: per1234 <[email protected]>

Author: geokeloglou

Language/Functions/Time/millis.adoc

@@ -56,7 +56,7 @@ void loop() {
   Serial.print("Time: ");
   myTime = millis();
 
-  Serial.println(myTime); //prints time since program started
+  Serial.println(myTime); // prints time since program started
   delay(1000);          // wait a second so as not to send massive amounts of data
 }
 ----