patch 7.4.2077
Problem: Cannot update 'tabline' when a tab was closed.
Solution: Add the TabClosed autocmd event. (partly by Felipe Morales)
diff --git a/src/vim.h b/src/vim.h
index d9a60dd..488f270 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -1331,6 +1331,7 @@
EVENT_TABENTER, /* after entering a tab page */
EVENT_TABLEAVE, /* before leaving a tab page */
EVENT_TABNEW, /* when entering a new tab page */
+ EVENT_TABCLOSED, /* after closing a tab page */
EVENT_SHELLCMDPOST, /* after ":!cmd" */
EVENT_SHELLFILTERPOST, /* after ":1,2!cmd", ":w !cmd", ":r !cmd". */
EVENT_TEXTCHANGED, /* text was modified */