Tweak topic listing

- Display topic timestamp OR latest reply timestamp
- Remove leading space
- Clean up 'T' and 'Z' in timestamp for readability
- Fix topic list left alignment bug

README.md

@@ -65,7 +65,7 @@ jimmy_foo@ctrl-c.club> topics
 ```
 
 1. The first column is the topic index.  This is the reference number to use when displaying or replying to a topic.
-1. The second column is the timestamp.  This is the server-local time when the topic was composed.
+1. The second column is the timestamp.  This is the server-local time when the topic was composed or last replied to.
 1. The third column is the author.  This is the user who composed the topic.
 1. The fourth column is the title.  This is the truncated first line of the topic.
 

TODO.md

@@ -18,7 +18,6 @@
 * Split helptext into separate file?
 
 # Features:
-* Change listing to show last updated timestamp, instead of thread creation timestamp
 * Message deletion
 * Message editing
 * Gracefully handle bad message files
@@ -54,3 +53,4 @@
 * Add color
 * Add full message corpus dump for backup/debugging
 * Add startup enviro health check
+* Change listing to show last updated timestamp, instead of thread creation timestamp

iris.rb

@@ -299,11 +299,15 @@ class Message
     stub.slice(0, length - 6) + '...'
   end
 
+  def latest_topic_timestamp
+    (replies.map(&:timestamp).max || timestamp).gsub(/T/, ' ').gsub(/Z/, '')
+  end
+
   def to_topic_line(index)
-    error_marker = valid? ? ' ' : 'X'
-    head = [error_marker, Display.print_index(index), timestamp, Display.print_author(author)].join(' | ')
-    message_stub = truncated_message(Display::WIDTH - head.length)
-    [head, message_stub].join(' | ')
+    error_marker = valid? ? '|' : 'X'
+    head = [Display.print_index(index), latest_topic_timestamp, Display.print_author(author)].join(' | ')
+    message_stub = truncated_message(Display::WIDTH - head.decolorize.length - 1)
+    error_marker + ' ' + [head, message_stub].join(' | ')
   end
 
   def to_display