improve readability of stdio: fix indentation and remove trailing spaces

Change-Id: Ic51e58a7c75d20bf770dc0ebd7f97a338fbe0036
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
diff --git a/libc/stdio/putchar.c b/libc/stdio/putchar.c
index 233cdfd..eeed0a2 100644
--- a/libc/stdio/putchar.c
+++ b/libc/stdio/putchar.c
@@ -42,7 +42,7 @@
 {
 	FILE *so = stdout;
 
-	return (putc_unlocked(c,so));
+	return (putc_unlocked(c, so));
 }
 
 #undef putchar