vis-lua: complete_command: utilize map_prefix() instead of grep

we already have a function for filtering by a prefix. No need for
snprintf and extra grep process for filtering.

also use simpler buffer_append for appending instead of going
through string formatting

1 files changed, 2 insertions, 1 deletions

diff --git a/vis.h b/vis.h
index 01bf1a0..80a37aa 100644
--- a/vis.h
+++ b/vis.h
@@ -1234,8 +1234,9 @@ bool vis_prompt_cmd(Vis *vis, const char *cmd);
  * Write newline separated list of available commands to ``buf``
  * @param vis The editor instance.
  * @param buf The buffer to write to.
+ * @param prefix Prefix to filter command list by.
  */
-void vis_print_cmds(Vis*, Buffer *buf);
+void vis_print_cmds(Vis*, Buffer *buf, const char *prefix);
 
 /**
  * Pipe a given file range to an external process.