Work around asciidoc unicode awfulness

Closes marijnh#227

Author: marijnh

20_node.txt

@@ -854,8 +854,8 @@ function respondErrorOrNothing(respond) {
 ----
 
 (((204 (HTTP status code))))(((body (HTTP))))When an ((HTTP))
-((response)) does not contain any data, the status code 204 (“no
-content”) can be used to indicate this. Since we need to provide
+((response)) does not contain any data, the status code 204
+“no content” can be used to indicate this. Since we need to provide
 callbacks that either report an error or return a 204 response in a
 few different situations, I wrote a `respondErrorOrNothing` function
 that creates such a callback.