rustdoc: Rename gen module to markdown_pass

Author: brson

src/rustdoc/gen.rs renamed to src/rustdoc/markdown_pass.rs

@@ -16,7 +16,7 @@ mod parse;
 mod extract;
 mod attr_parser;
 mod doc;
-mod gen;
+mod markdown_pass;
 mod fold;
 mod path_pass;
 mod attr_pass;

src/rustdoc/rustdoc.rc

@@ -102,6 +102,6 @@ fn run(source_file: str) {
         prune_undoc_pass::mk_pass(),
         desc_to_brief_pass::mk_pass(),
         trim_pass::mk_pass(),
-        gen::mk_pass {|| std::io:: stdout()}
+        markdown_pass::mk_pass {|| std::io:: stdout()}
     ]);
 }