Small improvements

- Improve formatting
- Fix some typos
- Mini code improvements

src/main/kotlin/org/mosad/thecitadelofricks/controller/CacheController.kt

@@ -48,11 +48,11 @@ class CacheController {
         scheduledUpdates()
     }
 
-    companion object{
+    companion object {
         private val logger: Logger = LoggerFactory.getLogger(CacheController::class.java)
 
         var courseList = CoursesList(CoursesMeta(), sortedMapOf())
-        var mensaMenu = MensaMenu(MensaMeta(0,""), MensaWeek(), MensaWeek())
+        var mensaMenu = MensaMenu(MensaMeta(0, ""), MensaWeek(), MensaWeek())
         var timetableList = HashMap<String, TimetableCourseWeek>() // this list contains all timetables
 
         /**
@@ -68,7 +68,7 @@ class CacheController {
                 val currentTime = System.currentTimeMillis() / 1000
                 val timetableLink = "https://mosad.xyz"
                 val weekNumberYear = 0
-                val instr = javaClass.getResourceAsStream("/html/Timetable_normal-week.html")
+                val instr = CacheController::class.java.getResourceAsStream("/html/Timetable_normal-week.html")
 
                 val timetableParser =
                     TimetableParser(htmlDoc = Jsoup.parse(instr, "UTF-8", "https://www.hs-offenburg.de/"))
@@ -151,7 +151,7 @@ class CacheController {
 
         /**
          * this function updates the courseList
-         * during the update process the old data will be returned for a API request
+         * during the update process the old data will be returned for an API request
          */
         private fun asyncUpdateCourseList() = GlobalScope.launch {
             CourseListParser().getCourseLinks(StartupController.courseListURL)?.let {
@@ -167,7 +167,7 @@ class CacheController {
 
         /**
          * this function updates the mensa menu list
-         * during the update process the old data will be returned for a API request
+         * during the update process the old data will be returned for an API request
          */
         private fun asyncUpdateMensa() = GlobalScope.launch {
             val mensaCurrentWeek = MensaParser().getMensaMenu(StartupController.mensaMenuURL)
@@ -183,7 +183,7 @@ class CacheController {
 
         /**
          * this function updates all existing timetables
-         * during the update process the old data will be returned for a API request
+         * during the update process the old data will be returned for an API request
          * a FixedThreadPool is used to make parallel requests for faster updates
          */
         private fun asyncUpdateTimetables() = GlobalScope.launch {