vim-patch:8.2.3684: blockwise insert does not handle autoindent properly

Problem:    Blockwise insert does not handle autoindent properly.
Solution:   Adjust text column for indent. (closes vim/vim#9229)
e9b0b40b79

src/nvim/ops.c

@@ -2311,6 +2311,13 @@ void op_insert(oparg_T *oap, long count1)
         }
       }
       bd.textcol = bd2.textcol;
+      /*
+       * If the insert was in the indent then include the indent
+       * change in the new text, otherwise don't.
+       */
+      if (did_indent && bd.textcol > ind_pre) {
+          bd.textcol += ind_post - ind_pre;
+      }
       bd.textlen = bd2.textlen;
     }