vim-patch:8.2.2458: Coverity warns for :retab using freed memory

Problem:    Coverity warns for :retab using freed memory.
Solution:   Use the updated line pointer when moving text properties.
https://github.com/vim/vim/commit/0dcd39bad5e5aa70ba8f60cb3fbf0658585f0151

N/A patches for version.c:

vim-patch:8.2.2457: Coverity warns for memory leak

Problem:    Coverity warns for memory leak.
Solution:   Free memory when out of memory.
https://github.com/vim/vim/commit/4dba04256b8a49b201d685217d3d7abc4988f090

src/nvim/ex_cmds.c

@@ -790,7 +790,10 @@ void ex_retab(exarg_T *eap)
             for (col = 0; col < len; col++) {
               ptr[col] = (col < num_tabs) ? '\t' : ' ';
             }
-            ml_replace(lnum, new_line, false);
+            if (ml_replace(lnum, new_line, false) == OK) {
+              // "new_line" may have been copied
+              new_line = curbuf->b_ml.ml_line_ptr;
+            }
             if (first_line == 0) {
               first_line = lnum;
             }