Documentation: update CodingStyle use of braces

After commit 38829dc9 ("Documentation/CodingStyle: flesh out if-else
examples") highlight that if _only_one_ branch of a conditional
statement is a single statement, then braces are to be used on both
branches.
Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Documentation/CodingStyle

@@ -166,8 +166,8 @@ if (condition)
 else
 	do_that();
 
-This does not apply if one branch of a conditional statement is a single
-statement. Use braces in both branches.
+This does not apply if only one branch of a conditional statement is a single
+statement; in the latter case use braces in both branches:
 
 if (condition) {
 	do_this();