Documentation: coding-style: Fix indentation in code-blocks

- Remove spaces in C code-blocks to align error labels consistently
- Replace tab characters with spaces in emacs-lisp code blocks

Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20240202231316.7606-1-thorsten.blum@toblux.com

Documentation/process/coding-style.rst

@@ -586,9 +586,9 @@ fix for this is to split it up into two error labels ``err_free_bar:`` and
 
 .. code-block:: c
 
-	 err_free_bar:
+	err_free_bar:
 		kfree(foo->bar);
-	 err_free_foo:
+	err_free_foo:
 		kfree(foo);
 		return ret;
 
@@ -679,7 +679,7 @@ values.  To do the latter, you can stick the following in your .emacs file:
           (c-offsets-alist . (
                   (arglist-close         . c-lineup-arglist-tabs-only)
                   (arglist-cont-nonempty .
-		      (c-lineup-gcc-asm-reg c-lineup-arglist-tabs-only))
+                      (c-lineup-gcc-asm-reg c-lineup-arglist-tabs-only))
                   (arglist-intro         . +)
                   (brace-list-intro      . +)
                   (c                     . c-lineup-C-comments)