vim-patch:8.2.1874: can't do something just before leaving Insert mode

Problem:    Can't do something just before leaving Insert mode.
Solution:   Add the InsertLeavePre autocommand event. (closes vim/vim#7177)
b53e13a91a

N/A patches for version.c:

vim-patch:8.1.1877: graduated features scattered

Problem:    Graduated features scattered.
Solution:   Put graduated and obsolete features together.
ffc0716af8

vim-patch:8.2.1875: warning when building GTK gui

Problem:    Warning when building GTK gui.
Solution:   Add missing function parameter.
3da855c8e2

vim-patch:8.2.1877: test for function list fails

Problem:    Test for function list fails.
Solution:   Move "obsolete" comments one line up.
b8f519e538

vim-patch:8.2.1878: GTK: error for redefining function

Problem:    GTK: error for redefining function. (Tony Mechelynck)
Solution:   Remove "gtk_" prefix from local functions and prepend "gui_" to
            global functions.
8a99e66b4f

vim-patch:8.2.1881: cannot build with GTK3

Problem:    Cannot build with GTK3.
Solution:   Adjust form functions.
692d1a51e7

vim-patch:8.2.1883: compiler warnings when using Python

Problem:    Compiler warnings when using Python.
Solution:   Adjust PyCFunction to also have the second argument.  Use "int"
            return type for some functions.  Insert "(void *)" to get rid of
            the remaining warnings.
4ce5fe4c87

src/nvim/edit.c

@@ -7691,6 +7691,10 @@ static bool ins_esc(long *count, int cmdchar, bool nomove)
     undisplay_dollar();
   }
 
+  if (cmdchar != 'r' && cmdchar != 'v') {
+    ins_apply_autocmds(EVENT_INSERTLEAVEPRE);
+  }
+
   // When an autoindent was removed, curswant stays after the
   // indent
   if (restart_edit == NUL && (colnr_T)temp == curwin->w_cursor.col) {