#254 Add an option for logging the output of commands

doc/ale.txt

@@ -199,6 +199,22 @@ g:ale_history_enabled                                   *g:ale_history_enabled*
   This option can be disabled if storing a command history is not desired.
 
 
+g:ale_history_log_output                             *g:ale_history_log_output*
+
+  Type: |Number|
+  Default: `0`
+
+  When set to `1`, ALE will store the output of commands which have completed
+  successfully in the command history, and the output will be displayed when
+  using |ALEInfo|.
+
+  |g:ale_history_enabled| must be set to `1` for this output to be stored or
+  printed.
+
+  ALE will likely consume a lot of memory if this option is on, so it should
+  only be used for debugging problems with linters.
+
+
 g:ale_keep_list_window_open                       *g:ale_keep_list_window_open*
 
   Type: |Number|