Add .editorconfig, adjust docs

We assume an 80-column terminal as a conservative default.
Having at least 2 blank columns at the end of a line helps readability
(for understanding that a line has ended and hasn't been cut off).
However, paragraphs are indented 2 spaces in the built-in help,
leaving a limit of 76 columns.

.editorconfig

@@ -0,0 +1,14 @@
+root = true
+
+[doc/*.adoc]
+end_of_line = lf
+max_line_length = 76
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+
+[*.hs]
+indent_size = 2
+indent_style = space
+tab_width = 8
+

doc/cmds_chanop.adoc

@@ -64,4 +64,4 @@ See also: kick, kickban
 
 View or set the topic of the current channel.
 
-Tab-completion with no `message` specified will load the current topic for editing.
+Tab-completion with no `message` specified will load the current topic.

doc/cmds_integration.adoc

@@ -5,15 +5,18 @@
 
 Send command directly to ZNC.
 
-The advantage of this over `+/msg+` is that responses are not broadcast to call clients.
+The advantage of this over `+/msg+` is that
+responses are not broadcast to call clients.
 
 == /znc-playback
 
 Request playback from the ZNC `playback` module.
 Note that the playback module is not installed in ZNC by default!
 
-When `date` is omitted, uses the most recent date in the past that makes sense.
-When both `time` and `date` are omitted, all playback is requested.
+When `date` is omitted,
+uses the most recent date in the past that makes sense.
+When both `time` and `date` are omitted,
+all playback is requested.
 
 Time format: `HOURS:MINUTES` (example: 7:00)
 

doc/cmds_window.adoc

@@ -28,12 +28,13 @@ See also: query, channel
 
 Clear a window.
 
-If no arguments are provided the current window is cleared.
-If `network` is provided the that network window is cleared.
-If `network` and `channel` are provided that chat window is cleared.
-If `network` is provided and `channel` is `*` all windows for that network are cleared.
+If no arguments are provided, the current window is cleared.
+If `channel` is not provided, the `network` window is cleared.
+If `channel` is `*`, all windows for `network` are cleared.
+If `channel` is provided, that chat window is cleared.
 
-If a window is cleared and no longer active that window will be removed from the client.
+If a window is cleared and no longer active (e.g. due to leaving a channel),
+that window will be removed entirely.
 
 == /windows
 
@@ -142,4 +143,6 @@ Set window property.
 Set window shortcut letter. If no letter is provided the next available
 letter will automatically be assigned.
 
-Available letters are configured in the `window-names` configuration setting.
+Available letters are configured in the `window-names` config setting,
+which defaults to the characters available from
+the top letter and number rows on a QWERTY keyboard.