coerces non-nil using to_s
# File net-imap-0.2.2/lib/net/imap/command_data.rb, line 294 def nstring(str) str.nil? ? nil : string(str) end
coerces using to_s
# File net-imap-0.2.2/lib/net/imap/command_data.rb, line 284 def string(str) str = str.to_s if str =~ LITERAL_REGEX Literal.new(str) else QuotedString.new(str) end end