Use HTML escaping for all of www/

Aspen doesn't give us what we need to pick the right escaping rules for
the conent we're actually rendering. HTML escaping works almost
everywhere we need it to right now.

gratipay/utils/i18n.py

@@ -17,7 +17,7 @@
 )
 from collections import OrderedDict
 import jinja2.ext
-from markupsafe import escape as htmlescape
+from markupsafe import escape
 
 
 ALIASES = {k: v.lower() for k, v in LOCALE_ALIASES.items()}
@@ -188,18 +188,10 @@ def format_currency_with_options(number, currency, locale='en', trailing_zeroes=
     return s
 
 
-def get_escape(request):
-    # XXX we should use the actual type of the response instead of guessing
-    html_ext = request.line.uri.path.raw.endswith('.html')
-    accept_html = 'text/html' in request.headers.get("Accept", "")
-    return htmlescape if html_ext or accept_html else lambda a: a
-
-
 def set_up_i18n(website, request):
     accept_lang = request.headers.get("Accept-Language", "")
     langs = request.accept_langs = list(parse_accept_lang(accept_lang))
     loc = match_lang(langs)
-    escape = get_escape(request)
     add_helpers_to_context(website.tell_sentry, request.context, escape, loc, request)