backend: non-functional code-fiddling: format codablock.c (clang-format

+ manual); add SPDX to all files; prefix include guards with Z_;
  move vim comment to bottom; remove some trailing spaces

backend/telepen.c

@@ -1,8 +1,7 @@
 /* telepen.c - Handles Telepen and Telepen numeric */
-
 /*
     libzint - the open source barcode library
-    Copyright (C) 2008-2021 Robin Stuart <rstuart114@gmail.com>
+    Copyright (C) 2008-2022 Robin Stuart <rstuart114@gmail.com>
 
     Redistribution and use in source and binary forms, with or without
     modification, are permitted provided that the following conditions
@@ -29,15 +28,15 @@
     OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     SUCH DAMAGE.
  */
-/* vim: set ts=4 sw=4 et : */
+/* SPDX-License-Identifier: BSD-3-Clause */
 
 /* Telepen Barcode Symbology information and History (BSiH)
    https://telepen.co.uk/wp-content/uploads/2018/10/Barcode-Symbology-information-and-History.pdf */
 
 #define SODIUM_X_F        (IS_NUM_F | IS_UX__F | IS_LX__F) /* SODIUM "0123456789Xx" */
 
-#include <stdio.h>
 #include "common.h"
+#include <stdio.h>
 
 static const char TeleTable[128][16] = {
     { "31313131"       }, { "1131313111"     }, { "33313111"       }, { "1111313131"     },
@@ -74,6 +73,7 @@ static const char TeleTable[128][16] = {
     { "31111111111111" }, { "111311111113"   }, { "131111111113"   },
     {'1','1','1','1','1','1','1','1','1','1','1','1','1','1','1','1'},
 };
+
 /* Generated by "backend/tests/test_telepen -f generate_lens -g" */
 static const char TeleLens[128] = {
      8, 10,  8, 10, 10,  8,  8, 12,  8, 10,  8, 10, 10, 10, 10, 12,
@@ -224,3 +224,5 @@ INTERNAL int telepen_num(struct zint_symbol *symbol, unsigned char source[], int
     ustrcpy(symbol->text, temp);
     return error_number;
 }
+
+/* vim: set ts=4 sw=4 et : */