implemented <ER> command for reading a file into the current buffer

* This command exists in Video TECO.
  In Video TECO it also supports reading multiple files with a glob pattern -- we do not support that
  as I am not convinced of its usefulness.
* teco_view_load() has been extended, so it can read into dot without
  discarding the existing document.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/ring.h b/src/ring.h
index b75846a..6114839 100644
--- a/src/ring.h
+++ b/src/ring.h
@@ -99,6 +99,7 @@ void teco_ring_cleanup(void);
 
 TECO_DECLARE_STATE(teco_state_edit_file);
 TECO_DECLARE_STATE(teco_state_save_file);
+TECO_DECLARE_STATE(teco_state_read_file);
 
 void teco_state_ecommand_close(teco_machine_main_t *ctx, GError **error);