Don't apply .nowrap to pre elements

Align CSS with Antora by using `.doc :not(pre).nowrap` to exclude pre
blocks from having `white-space: nowrap` applied.

Closes gh-22

Author: philwebb

src/main/css/asciidoctor.css

@@ -849,7 +849,7 @@ i.fa.icon-warning {
 
 /* Pass-though Classes */
 
-.doc .nowrap {
+.doc :not(pre).nowrap {
   white-space: nowrap;
 }
 

src/test/asciidoc/standard.adoc

@@ -242,6 +242,22 @@ Why not have some YAML:
 	    import: "optional:file:./dev.properties"
 ----
 
+Or some HTTP that also has `nowrap` set:
+
+[source,http,options="nowrap"]
+----
+HTTP/1.1 200 OK
+Content-Type: application/vnd.spring-boot.actuator.v3+json
+Content-Length: 121
+{
+  "events" : [ {
+    "timestamp" : "2021-03-18T16:49:30.625Z",
+    "principal" : "alice",
+    "type" : "logout"
+  } ]
+}
+----
+
 
 
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