Add (and use) completion.use_best_match config

qutebrowser/commands/runners.py

@@ -218,7 +218,9 @@ class CommandParser:
         for valid_command in cmdutils.cmd_dict:
             if valid_command.find(cmdstr) == 0:
                 matches.append(valid_command)
-        if len(matches) >= 1:
+        if len(matches) == 1:
+            cmdstr = matches[0]
+        elif len(matches) > 1 and config.val.completion.use_best_match:
             cmdstr = matches[0]
         return cmdstr
 

qutebrowser/config/configdata.yml

@@ -656,6 +656,11 @@ completion.web_history_max_items:
 
     0: no history / -1: unlimited
 
+completion.use_best_match:
+  type: Bool
+  default: true
+  desc: Whether to execute the best-matching command on a partial match.
+
 ## downloads
 
 downloads.location.directory: