patch 8.2.2349: Vim9: cannot handle line break after parenthesis at line end

Problem:    Vim9: cannot handle line break after parenthesis at line end.
Solution:   Skip over line break. (closes #7677)

src/testdir/test_vim9_expr.vim

@@ -2523,6 +2523,7 @@ enddef
 
 def Test_expr7_parens()
   # (expr)
+  var lines =<< trim END
       assert_equal(4, (6 * 4) / 6)
       assert_equal(0, 6 * ( 4 / 6 ))
 
@@ -2530,11 +2531,18 @@ def Test_expr7_parens()
       assert_equal(-6, -6)
       assert_equal(false, !-3)
       assert_equal(true, !+0)
-enddef
 
-def Test_expr7_parens_vim9script()
+      assert_equal(7, 5 + (
-  var lines =<< trim END
+                    2))
-      vim9script
+      assert_equal(7, 5 + (
+                    2
+                    ))
+      assert_equal(7, 5 + ( # comment
+                    2))
+      assert_equal(7, 5 + ( # comment
+                    # comment
+                    2))
+
       var s = (
 		'one'
 		..
@@ -2542,7 +2550,7 @@ def Test_expr7_parens_vim9script()
 		)
       assert_equal('onetwo', s)
   END
-  CheckScriptSuccess(lines)
+  CheckDefAndScriptSuccess(lines)
 enddef
 
 def Test_expr7_negate_add()

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2349,
 /**/
     2348,
 /**/

src/vim9compile.c

@@ -3554,8 +3554,10 @@ compile_leader(cctx_T *cctx, int numeric_only, char_u *start, char_u **end)
 compile_parenthesis(char_u **arg, cctx_T *cctx, ppconst_T *ppconst)
 {
     int	    ret;
+    char_u  *p = *arg + 1;
 
-    *arg = skipwhite(*arg + 1);
+    if (may_get_next_line_error(p, arg, cctx) == FAIL)
+	return FAIL;
     if (ppconst->pp_used <= PPSIZE - 10)
     {
 	ret = compile_expr1(arg, cctx, ppconst);