patch 8.2.1064: Vim9: no line break allowed before comperators

Problem:    Vim9: no line break allowed before comperators.
Solution:   Check for comperator after line break.

src/eval.c

@@ -2191,6 +2191,7 @@ eval4(char_u **arg, typval_T *rettv, evalarg_T *evalarg)
 {
     typval_T	var2;
     char_u	*p;
+    int		getnext;
     int		i;
     exptype_T	type = EXPR_UNKNOWN;
     int		len = 2;
@@ -2202,7 +2203,7 @@ eval4(char_u **arg, typval_T *rettv, evalarg_T *evalarg)
     if (eval5(arg, rettv, evalarg) == FAIL)
 	return FAIL;
 
-    p = *arg;
+    p = eval_next_non_blank(*arg, evalarg, &getnext);
     switch (p[0])
     {
 	case '=':   if (p[1] == '=')
@@ -2247,6 +2248,9 @@ eval4(char_u **arg, typval_T *rettv, evalarg_T *evalarg)
      */
     if (type != EXPR_UNKNOWN)
     {
+	if (getnext)
+	    *arg = eval_next_line(evalarg);
+
 	// extra question mark appended: ignore case
 	if (p[len] == '?')
 	{

src/testdir/test_vim9_expr.vim

@@ -529,6 +529,43 @@ def RetVoid()
   let x = 1
 enddef
 
+def Test_expr4_vimscript()
+  " only checks line continuation
+  let lines =<< trim END
+      vim9script
+      let var = 0
+      		< 1
+      assert_equal(1, var)
+  END
+  CheckScriptSuccess(lines)
+
+  lines =<< trim END
+      vim9script
+      let var = 123
+      		!= 123
+      assert_equal(0, var)
+  END
+  CheckScriptSuccess(lines)
+
+  lines =<< trim END
+      vim9script
+      let list = [1, 2, 3]
+      let var = list
+      		is list
+      assert_equal(1, var)
+  END
+  CheckScriptSuccess(lines)
+
+  lines =<< trim END
+      vim9script
+      let myblob = 0z1234
+      let var = myblob
+      		isnot 0z11
+      assert_equal(1, var)
+  END
+  CheckScriptSuccess(lines)
+enddef
+
 func Test_expr4_fails()
   let msg = "white space required before and after '>'"
   call CheckDefFailure(["let x = 1>2"], msg)

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1064,
 /**/
     1063,
 /**/