diff: shrink code (-85 bytes):
function                                             old     new   delta
fiddle_sum                                             8       -      -8
diffreg                                             2717    2690     -27
prepare                                              334     284     -50
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/2 up/down: 0/-85)             Total: -85 bytes

s/ATTRIBUTE_ALWAYS_INLINE/ALWAYS_INLINE/g

diff --git a/editors/awk.c b/editors/awk.c
index 9d306bf..90ba643 100644
--- a/editors/awk.c
+++ b/editors/awk.c
@@ -677,7 +677,7 @@
 	return c;
 }
 
-static int ATTRIBUTE_ALWAYS_INLINE isalnum_(int c)
+static int ALWAYS_INLINE isalnum_(int c)
 {
 	return (isalnum(c) || c == '_');
 }