tdiff: rename class to fix AIX - plan9port - [fork] Plan 9 from user space
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       ---
   DIR commit d4a4b66a401d8988441dd663bf1664e11c045797
   DIR parent 84167be4ad170c879db48493438f507c2d40d28d
  HTML Author: Russ Cox <rsc@swtch.com>
       Date:   Mon, 18 May 2020 19:55:01 -0400
       
       diff: rename class to fix AIX
       
       math.h defines a function named class on AIX.
       
       Diffstat:
         M src/cmd/diff/diffreg.c              |       3 +++
       
       1 file changed, 3 insertions(+), 0 deletions(-)
       ---
   DIR diff --git a/src/cmd/diff/diffreg.c b/src/cmd/diff/diffreg.c
       t@@ -66,6 +66,9 @@
        *        3*(number of k-candidates installed),  typically about
        *        6n words for files of length n.
        */
       +
       +#define class diffclass
       +
        /* TIDY THIS UP */
        struct cand {
                int x;