FIX: modem.clear() bug

include/drv/cli_device.h

@@ -283,6 +283,7 @@ class cli_device
         //! Clears the incoming data buffer
         void clear () noexcept {
             rx_q.clear();
+            streams_.store(size_t(0), std::memory_order_release);
         }
 
         //! \return     Returns the size of the incoming data buffer

include/utils/print.h

@@ -50,7 +50,7 @@ namespace tbx {
      *
      * Requirements:
      *  - size_t write_impl(const Char_t* buffer, size_t size) : Return the number of \c Char_t written
-     *  - size_t write_(const Char_t ch) : Return the number of \c Char_t written (normally one).
+     *  - size_t write_impl(const Char_t ch) : Return the number of \c Char_t written (normally one).
      *
      * \tparam Impl_t       The derived type
      * \tparam Char_t       The char type to use