Add missing quotes around value of snippets attribute

jd1 · wilkinsona · commit 9d4a118993ea · 2017-04-26T14:47:52.000+01:00
Closes gh-389
diff --git a/docs/src/docs/asciidoc/working-with-asciidoctor.adoc b/docs/src/docs/asciidoc/working-with-asciidoctor.adoc
@@ -33,7 +33,7 @@ for the index operation:
 
 [source,indent=0]
 ----
-operation::index[snippets=curl-request,http-request,http-response]
+operation::index[snippets='curl-request,http-request,http-response']
 ----
 
 To include all of an operation's snippets, the `snippets` attribute can be omitted:
