Ensure all source code end with one and only one newline

by this command:
git ls-files -z | while IFS= read -rd '' f; do tail -c1 < "$f" | read -r _ || echo >> "$f"; done

examples/elf/tests/helloxx/.gitignore

@@ -2,4 +2,4 @@ hello++1
 hello++2
 hello++3
 hello++4
-hello++5
+hello++5

examples/webserver/httpd-fs/404.html

@@ -5,4 +5,4 @@
       <h3>Go <a href="/">here</a> instead.</h3>
     </center>
   </body>
-</html>
+</html>

examples/webserver/httpd-fs/tcp.shtml

@@ -2,4 +2,4 @@
 <h1>Current connections</h1><br><table width="100%">
 <tr><th>Local</th><th>Remote</th><th>State</th><th>Retransmissions</th><th>Timer</th><th>Flags</th></tr>
 %! tcp-connections
-%!: /footer.html
+%!: /footer.html

examples/wgetjson/webserver/wgetjson/json_cmd.php

@@ -10,4 +10,4 @@ $ja["format"]["interlace"] = false;
 $ja["format"]["frame rate"] = 24;
 
 echo json_encode($ja);
-?>
+?>

examples/wgetjson/webserver/wgetjson/post_cmd.php

@@ -1,3 +1,3 @@
 <?php
 echo json_encode($_POST);
-?>
+?>

graphics/ft80x/ft80x_ramdl.c

@@ -128,4 +128,4 @@ int ft80x_ramdl_append(int fd, FAR const void *data, size_t len)
 
   DEBUGASSERT(nwritten == len);
   return OK;
-}
+}

graphics/slcd/slcd_mapping.cxx

@@ -193,4 +193,4 @@ namespace SLcd
       .segments = SEGMENT_5
     }
   };
-}
+}

include/interpreters/minibasic.h

@@ -69,4 +69,4 @@
 
 int basic(FAR const char *script, FILE *in, FILE *out, FILE *err);
 
-#endif
+#endif

include/testing/.gitignore

@@ -1,2 +1,2 @@
 /unity.h
-/unity_internals.h
+/unity_internals.h

platform/dummy/dummy.c

@@ -0,0 +1 @@
+

testing/.gitignore

@@ -1 +1 @@
-/Kconfig
+/Kconfig

wireless/ieee802154/i8sak/i8sak_tx.c

@@ -300,4 +300,4 @@ static void tx_eventcb(FAR struct ieee802154_primitive_s *primitive, FAR void *a
   sem_post(&i8sak->sigsem);
 
   i8sak_requestdaemon(i8sak);
-}
+}