patch 8.2.2859: Tcl test fails because of changed error message

Problem:    Tcl test fails because of changed error message.
Solution:   Adjust the expected error message.

src/testdir/test_tcl.vim

@@ -145,7 +145,7 @@ func Test_vim_expr()
 
   call assert_fails('tcl ::vim::expr x y',
         \           'wrong # args: should be "::vim::expr vimExpr"')
-  call assert_fails('tcl ::vim::expr 1-', 'E15: Invalid expression: 1-')
+  call assert_fails('tcl ::vim::expr 1-', 'E15: Invalid expression: "1-"')
 endfunc
 
 " Test ::vim::command

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2859,
 /**/
     2858,
 /**/