AP_InertialSensor: examples: add coding style fixes

Several coding style problems were already fixed by previous commit,
just finish the cleanup on this example:

  - replace tabs with spaces
  - remove unneeded \r
  - remove extra spaces

libraries/AP_InertialSensor/examples/INS_generic/INS_generic.cpp

@@ -39,10 +39,10 @@ void loop(void)
 
     hal.console->println();
     hal.console->println(
-    "Menu:\r\n"
-    "    d) display offsets and scaling\r\n"
-    "    l) level (capture offsets from level)\r\n"
-    "    t) test\r\n"
+    "Menu:\n"
+    "    d) display offsets and scaling\n"
+    "    l) level (capture offsets from level)\n"
+    "    t) test\n"
     "    r) reboot");
 
     // wait for user input
@@ -111,7 +111,6 @@ static void run_test()
 
     // loop as long as user does not press a key
     while (!hal.console->available()) {
-
         // wait until we have a sample
         ins.wait_for_sample();