fix(util): deepcopy dicts instead

It was possible for writes to happen in nested dicts, causing global
data to change and confuse the system.
Not that I wouldn't be aware of that danger, but apparently I didn't
see the recursiveness of the call tree :).

Author: Byron

src/mako/lib/schema.mako

@@ -1,13 +1,13 @@
 <%! from util import (schema_markers, rust_doc_comment, mangle_ident, to_rust_type, put_and, 
-			  	      IO_TYPES, activity_split, enclose_in, REQUEST_MARKER_TRAIT, mb_type) 
+			  	      IO_TYPES, activity_split, enclose_in, REQUEST_MARKER_TRAIT, mb_type, indent_all_but_first_by) 
 %>\
 ## Create new schema with everything.
 ## 's' contains the schema structure from json to build
 ###################################################################################################################
 ###################################################################################################################
 <%def name="new(s, c)">\
 <% 
-	## assert s.type == "object" 
+	assert s.type == "object" 
 	markers = schema_markers(s, c)
 %>\
 <%block filter="rust_doc_comment">\
@@ -18,7 +18,7 @@ pub struct ${s.id}\
 % if 'properties' in s:
  {
 % for pn, p in s.properties.iteritems():
-	${p.get('description', 'no description provided') | rust_doc_comment}
+	${p.get('description', 'no description provided') | rust_doc_comment, indent_all_but_first_by(1)}
 	pub ${mangle_ident(pn)}: ${to_rust_type(s.id, pn, p)},
 % endfor
 }

src/mako/lib/util.py

@@ -2,6 +2,7 @@
 import os
 from random import (randint, random, choice, seed)
 import collections
+from copy import deepcopy
 
 seed(1337)
 
@@ -271,7 +272,6 @@ def nested_type(nt):
         else:
             assert(is_nested_type_property(nt))
             # It's a nested type - we take it literally like $ref, but generate a name for the type ourselves
-            # This of course assumes
             return nested_type_name(sn, pn)
         return to_rust_type(sn, pn, nt, allow_optionals=False)
 
@@ -331,7 +331,7 @@ def iter_nested_types(schemas):
     def iter_nested_properties(prefix, properties):
         for pn, p in properties.iteritems():
             if is_nested_type_property(p):
-                ns = p.copy()
+                ns = deepcopy(p)
                 ns.id = nested_type_name(prefix, pn)
                 ns[NESTED_TYPE_MARKER] = True
                 if 'items' in p:
@@ -410,7 +410,7 @@ def method_params(m, required=None, location=None):
             continue
         if location is not None and p.get('location', '') != location:
             continue
-        np = p.copy()
+        np = deepcopy(p)
         np['name'] = pn
         try:
             # po = ['part', 'foo']