patch 8.2.2315: Vim9: "enddef" as dict key misintepreted as function end

Problem:    Vim9: "enddef" as dict key misintepreted as function end.
Solution:   Check for following colon. (closes #7640)
diff --git a/src/testdir/test_vim9_func.vim b/src/testdir/test_vim9_func.vim
index 9f19ebd..fb37401 100644
--- a/src/testdir/test_vim9_func.vim
+++ b/src/testdir/test_vim9_func.vim
@@ -116,6 +116,14 @@
   CheckScriptFailure(lines, 'E126:', 2)
 enddef
 
+def Test_enddef_dict_key()
+  var d = {
+    enddef: 'x',
+    endfunc: 'y',
+  }
+  assert_equal({enddef: 'x', endfunc: 'y'}, d)
+enddef
+
 def ReturnString(): string
   return 'string'
 enddef
diff --git a/src/userfunc.c b/src/userfunc.c
index 814d400..1918e54 100644
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -3444,8 +3444,10 @@
 		;
 
 	    // Check for "endfunction" or "enddef".
+	    // When a ":" follows it must be a dict key; "enddef: value,"
 	    if (checkforcmd(&p, nesting_def[nesting]
-						? "enddef" : "endfunction", 4))
+						? "enddef" : "endfunction", 4)
+		    && *p != ':')
 	    {
 		if (nesting-- == 0)
 		{
@@ -3484,7 +3486,7 @@
 	    // not find it.
 	    else if (nesting_def[nesting])
 	    {
-		if (checkforcmd(&p, "endfunction", 4))
+		if (checkforcmd(&p, "endfunction", 4) && *p != ':')
 		    emsg(_(e_mismatched_endfunction));
 	    }
 	    else if (eap->cmdidx == CMD_def && checkforcmd(&p, "enddef", 4))
diff --git a/src/version.c b/src/version.c
index 7ab3b01..1078665 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2315,
+/**/
     2314,
 /**/
     2313,