Remove the double empty lines from all source files (#2009)

* Run dos2unix for all source files

* Remove the trail space from all source files

* Remove the double empty lines from all source files

.github/workflows/build_micropython.yml

@@ -37,6 +37,5 @@ jobs:
         echo "import gc,utime;
         utime.sleep(5);
         gc.collect();
-        utime.sleep(5)" | 
+        utime.sleep(5)" |
         ports/unix/micropython -i lib/lv_bindings/examples/advanced_demo.py
-