patch 8.2.1361: error for white space after expression in assignment

Problem:    Error for white space after expression in assignment.
Solution:   Skip over white space. (closes #6617)

src/eval.c

@@ -903,6 +903,7 @@ get_lval(
 		    clear_tv(&var1);
 		    return NULL;
 		}
+		p = skipwhite(p);
 	    }
 
 	    // Optionally get the second index [ :expr].

src/testdir/test_expr.vim

@@ -55,6 +55,9 @@ func Test_dict()
   let d['a'] = 'aaa'
   call assert_equal('none', d[''])
   call assert_equal('aaa', d['a'])
+
+  let d[ 'b' ] = 'bbb'
+  call assert_equal('bbb', d[ 'b' ])
 endfunc
 
 func Test_strgetchar()

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1361,
 /**/
     1360,
 /**/