Remove the whitespace between the content-type and charset of the def…

…ault error views.

CHANGES.rst

@@ -5,8 +5,10 @@
 1.2 (unreleased)
 ================
 
-- Nothing changed yet.
-
+- Remove the whitespace between the content-type and charset of the default
+  error views. This is because in certain cases zope.publisher.http will parse
+  the content type parameters and combine them back again without the
+  whitespace. This fix makes things more predictable esp. in tests.
 
 1.1 (2018-01-10)
 ================

src/zope/errorview/http.py

@@ -41,7 +41,7 @@ def __init__(self, context, request):
     def update(self):
         self.request.response.setStatus(500)
         self.request.response.setHeader(
-            'Content-Type', 'text/plain; charset=utf-8')
+            'Content-Type', 'text/plain;charset=utf-8')
 
     def render(self):
         return ''