patch 8.0.0533: abbreviation doesn't work after backspacing newline

Problem:    Abbreviation doesn't work after backspacing newline. (Hkonrk)
Solution:   Set the insert start column. (closes #1609)
diff --git a/src/edit.c b/src/edit.c
index 8aa15af..fae48c6 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -9017,7 +9017,7 @@
 #endif
 
     /*
-     * delete newline!
+     * Delete newline!
      */
     if (curwin->w_cursor.col == 0)
     {
@@ -9032,7 +9032,7 @@
 			       (linenr_T)(curwin->w_cursor.lnum + 1)) == FAIL)
 		return FALSE;
 	    --Insstart.lnum;
-	    Insstart.col = MAXCOL;
+	    Insstart.col = STRLEN(ml_get(Insstart.lnum));
 	}
 	/*
 	 * In replace mode:
diff --git a/src/testdir/test_mapping.vim b/src/testdir/test_mapping.vim
index fa8012a..ab02a87 100644
--- a/src/testdir/test_mapping.vim
+++ b/src/testdir/test_mapping.vim
@@ -160,3 +160,14 @@
   set nomodified
   iunmap <M-">
 endfunc
+
+func Test_abbr_after_line_join()
+  new
+  abbr foo bar
+  set backspace=indent,eol,start
+  exe "normal o\<BS>foo "
+  call assert_equal("bar ", getline(1))
+  bwipe!
+  unabbr foo
+  set backspace&
+endfunc
diff --git a/src/version.c b/src/version.c
index 76929e7..6517288 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    533,
+/**/
     532,
 /**/
     531,