♻️📚 Refactor and document SequenceSet#inspect

Author: nevans

lib/net/imap/sequence_set.rb

@@ -1630,13 +1630,27 @@ def normalized_string
         @tuples.empty? ? nil : -@tuples.map { tuple_to_str _1 }.join(",")
       end
 
+      # Returns an inspection string for the SequenceSet.
+      #
+      #   Net::IMAP::SequenceSet.new.inspect
+      #   #=> "#<Net::IMAP::SequenceSet empty>"
+      #
+      #   Net::IMAP::SequenceSet(1..5, 1024, 15, 2000).inspect
+      #   #=> '#<Net::IMAP::SequenceSet "1:5,15,1024,2000">'
+      #
+      # Frozen sets have slightly different output:
+      #
+      #   Net::IMAP::SequenceSet.empty.inspect
+      #   #=> "Net::IMAP::SequenceSet.empty"
+      #
+      #   Net::IMAP::SequenceSet[1..5, 1024, 15, 2000].inspect
+      #   #=> 'Net::IMAP::SequenceSet["1:5,15,1024,2000"]'
+      #
       def inspect
         if empty?
-          (frozen? ?  "%s.empty" : "#<%s empty>") % [self.class]
-        elsif frozen?
-          "%s[%p]"   % [self.class, to_s]
+          (frozen? ? "%s.empty" : "#<%s empty>") % [self.class]
         else
-          "#<%s %p>" % [self.class, to_s]
+          (frozen? ? "%s[%p]" : "#<%s %p>") % [self.class, to_s]
         end
       end