rustdoc: Collapse before unindenting

Doesn't make much sense to unindent each line individually and *then* collapse
them all together.

src/librustdoc/passes.rs

@@ -173,7 +173,6 @@ fn fold_item(&mut self, i: Item) -> Option<Item> {
     (crate, None)
 }
 
-// n.b. this is copied from src/librustdoc/unindent_pass.rs
 pub fn unindent(s: &str) -> ~str {
     let lines = s.any_line_iter().collect::<~[&str]>();
     let mut saw_first_line = false;

src/librustdoc/rustdoc.rs

@@ -61,10 +61,10 @@ pub mod html {
 ];
 
 static DEFAULT_PASSES: &'static [&'static str] = &[
-    "unindent-comments",
-    "collapse-docs",
     "strip-hidden",
     "strip-private",
+    "collapse-docs",
+    "unindent-comments",
 ];
 
 local_data_key!(pub ctxtkey: @core::DocContext)