Reports doctring error on named return mismatch.

test/libsolidity/syntaxTests/natspec/dosctring_named_return_parameter.sol

@@ -0,0 +1,5 @@
+abstract contract C {
+    /// @return value The value returned by this function.
+    function vote() public virtual returns (uint value);
+}
+// ----

test/libsolidity/syntaxTests/natspec/invalid/dosctring_named_return_param_mismatch.sol

@@ -0,0 +1,7 @@
+abstract contract C {
+    /// @param id Some identifier
+    /// @return No value returned
+    function vote(uint id) public virtual returns (uint value);
+}
+// ----
+// DocstringParsingError: Doc tag "@return No value returned" does not contain the name of its return parameter.

test/libsolidity/syntaxTests/natspec/invalid/dosctring_return_size_mismatch.sol

@@ -0,0 +1,7 @@
+abstract contract C {
+    /// @param id Some identifier
+    /// @return No value returned
+    function vote(uint id) public virtual returns (uint value);
+}
+// ----
+// DocstringParsingError: Doc tag "@return No value returned" does not contain the name of its return parameter.