+.PP
+In order to allow tokens to contain internal whitespace, a quoting
+mechanism is provided. Whitespace within matched pairs of quotes \(en
+either single
+.RB ` ' '
+or double
+.RB ` """" '
+\(en is considered to be internal. Any character (other than newline)
+may be escaped by preceding it with a backslash
+.RB ` \e ':
+in particular, this can be used to include quote characters. It is
+impossible for a token to contain a newline character.
+.PP
+On output, the server will use double quotes when necessary.