Trivial isoltest updates: missing // ---- at the end

test/libsolidity/syntaxTests/license/license_bidi_marks.sol

@@ -3,3 +3,4 @@
 // NOTE: The text above is reversed using Unicode directional marks. In raw form it would look like this:
 // <LRO>0.3-LPG :reifitnedI-esneciL-XDPS<PDF>
 contract C {}
+// ----

test/libsolidity/syntaxTests/license/license_bottom.sol

@@ -1,3 +1,4 @@
 // This test is actually useless, as the test suite adds the automatic preamble.
 contract C {}
 // SPDX-License-Identifier: GPL-3.0
+// ----

test/libsolidity/syntaxTests/license/license_hidden_unicode.sol

@@ -1,3 +1,4 @@
 // This is parsed as GPL-3.0:
 // SPDX-License-Identifier: GPL-3.0 ⡉⡊⡋⡌⡍⡎⡏⡐⡑⡒
 contract C {}
+// ----

test/libsolidity/syntaxTests/license/license_missing.sol

@@ -1,2 +1,3 @@
 // This test is actually useless, as the test suite adds the automatic preamble.
 contract C {}
+// ----

test/libsolidity/syntaxTests/license/license_missing_colon.sol

@@ -1,3 +1,4 @@
 // This test is actually useless, as the test suite adds the automatic preamble.
 // SPDX-License-Identifier GPL-3.0
 contract C {}
+// ----

test/libsolidity/syntaxTests/license/license_multiline.sol

@@ -1,3 +1,4 @@
 // This test is actually useless, as the test suite adds the automatic preamble.
 /* SPDX-License-Identifier: GPL-3.0 */
 contract C {}
+// ----

test/libsolidity/syntaxTests/license/license_natspec.sol

@@ -1,3 +1,4 @@
 // This test is actually useless, as the test suite adds the automatic preamble.
 /// SPDX-License-Identifier: GPL-3.0
 contract C {}
+// ----

test/libsolidity/syntaxTests/license/license_natspec_multiline.sol

@@ -1,3 +1,4 @@
 // This test is actually useless, as the test suite adds the automatic preamble.
 /** SPDX-License-Identifier: GPL-3.0 */
 contract C {}
+// ----

test/libsolidity/syntaxTests/license/license_no_whitespace.sol

@@ -1,3 +1,4 @@
 // This test is actually useless, as the test suite adds the automatic preamble.
 //SPDX-License-Identifier:GPL-3.0
 contract C {}
+// ----

test/libsolidity/syntaxTests/license/license_no_whitespace_multiline.sol

@@ -1,3 +1,4 @@
 // This test is actually useless, as the test suite adds the automatic preamble.
 /*SPDX-License-Identifier:GPL-3.0*/
 contract C {}
+// ----

test/libsolidity/syntaxTests/license/license_nonempty_line.sol

@@ -1,3 +1,4 @@
 // This test is actually useless, as the test suite adds the automatic preamble.
 pragma solidity >= 0.0; // SPDX-License-Identifier: GPL-3.0
 contract C {}
+// ----

test/libsolidity/syntaxTests/license/license_whitespace_after_colon.sol

@@ -1,2 +1,3 @@
 // SPDX-License-Identifier:    GPL-3.0
 contract C {}
+// ----

test/libsolidity/syntaxTests/license/license_whitespace_before_spdx.sol

@@ -1,2 +1,3 @@
 //     SPDX-License-Identifier: GPL-3.0
 contract C {}
+// ----

test/libsolidity/syntaxTests/license/license_whitespace_trailing.sol

@@ -1,3 +1,4 @@
 // SPDX-License-Identifier: GPL-3.0   
 // NOTE: Trailing space at the end of the line above is intentional.
 contract C {}
+// ----