patch 7.4.1087
Problem: CTRL-A and CTRL-X do not work properly with blockwise visual
selection if there is a mix of Tab and spaces.
Solution: Add OP_NR_ADD and OP_NR_SUB. (Hirohito Higashi)
diff --git a/src/vim.h b/src/vim.h
index fd0b0b0..81d0929 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -1457,6 +1457,10 @@
#define OP_FOLDDELREC 25 /* "zD" delete folds recursively */
#define OP_FORMAT2 26 /* "gw" format operator, keeps cursor pos */
#define OP_FUNCTION 27 /* "g@" call 'operatorfunc' */
+#define OP_NR_ADD 28 /* "<C-A>" Add to the number or alphabetic
+ character (OP_ADD conflicts with Perl) */
+#define OP_NR_SUB 29 /* "<C-X>" Subtract from the number or
+ alphabetic character */
/*
* Motion types, used for operators and for yank/delete registers.