Fix typo in comment.

diff --git a/src/alloc.c b/src/alloc.c
index ca4abba..8e0cf5d 100644 (file)
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -1521,14 +1521,13 @@ struct sdata
 
   union
   {
-    /* When STRING in non-null.  */
+    /* When STRING is non-null.  */
     unsigned char data[1];
 
     /* When STRING is null.  */
     EMACS_INT nbytes;
   } u;
 
-
 #define SDATA_NBYTES(S)        (S)->u.nbytes
 #define SDATA_DATA(S)  (S)->u.data