patch 8.2.1073: Vim9: no line break allowed in () expression

Problem:    Vim9: no line break allowed in () expression.
Solution:   Skip a line break.

src/eval.c

@@ -2453,6 +2453,9 @@ eval5(char_u **arg, typval_T *rettv, evalarg_T *evalarg)
 	if (op == '.' && *(*arg + 1) == '.')  // .. string concatenation
 	    ++*arg;
 	*arg = skipwhite(*arg + 1);
+	eval_next_non_blank(*arg, evalarg, &getnext);
+	if (getnext)
+	    *arg = eval_next_line(evalarg);
 	if (eval6(arg, &var2, evalarg, op == '.') == FAIL)
 	{
 	    clear_tv(rettv);
@@ -2890,8 +2893,18 @@ eval7(
      * nested expression: (expression).
      */
     case '(':	{
+		    int getnext;
+
 		    *arg = skipwhite(*arg + 1);
+		    eval_next_non_blank(*arg, evalarg, &getnext);
+		    if (getnext)
+			*arg = eval_next_line(evalarg);
+
 		    ret = eval1(arg, rettv, evalarg);	// recursive!
+
+		    eval_next_non_blank(*arg, evalarg, &getnext);
+		    if (getnext)
+			*arg = eval_next_line(evalarg);
 		    if (**arg == ')')
 			++*arg;
 		    else if (ret == OK)

src/testdir/test_vim9_expr.vim

@@ -1137,6 +1137,19 @@ def Test_expr7_parens()
   assert_equal(true, !+-+0)
 enddef
 
+def Test_expr7_parens_vim9script()
+  let lines =<< trim END
+      vim9script
+      let s = (
+		'one'
+		..
+		'two'
+		)
+      assert_equal('onetwo', s)
+  END
+  CheckScriptSuccess(lines)
+enddef
+
 def Test_expr7_negate()
   assert_equal(-99, -99)
   assert_equal(99, --99)

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1073,
 /**/
     1072,
 /**/