Update doxygen

Author: alinaliBQ

cpp/src/arrow/flight/sql/odbc/odbc_impl/odbc_statement.h

@@ -80,15 +80,11 @@ class ODBCStatement : public ODBCHandle<ODBCStatement> {
   bool GetData(SQLSMALLINT record_number, SQLSMALLINT c_type, SQLPOINTER data_ptr,
                SQLLEN buffer_length, SQLLEN* indicator_ptr);
 
-  /**
-   * @brief Closes the cursor. This does _not_ un-prepare the statement or change
-   * bindings.
-   */
+  /// \brief Closes the cursor. This does _not_ un-prepare the statement or change
+  /// bindings.
   void CloseCursor(bool suppress_errors);
 
-  /**
-   * @brief Releases this statement from memory.
-   */
+  /// \brief Releases this statement from memory.
   void ReleaseStatement();
 
   void GetTables(const std::string* catalog, const std::string* schema,

cpp/src/arrow/flight/sql/odbc/tests/statement_test.cc

@@ -48,7 +48,7 @@ TYPED_TEST(StatementTest, TestSQLCloseCursor) {
 }
 
 TYPED_TEST(StatementTest, TestSQLFreeStmtSQLCloseWithoutCursor) {
-  // SQLFreeStmt(SQL_CLOSE) does not throw error with invalid cursor
+  // Verify SQLFreeStmt(SQL_CLOSE) does not throw error with invalid cursor
 
   ASSERT_EQ(SQL_SUCCESS, SQLFreeStmt(this->stmt, SQL_CLOSE));
 }