do not allow specs with zwsp characters

For some reason a number of specs (and docs) have zwsp characters
inserted in URLs. This causes crud in the reviews, and really
confusing errors around line lengths for people (we count them, but
they aren't seen in their editor).

This removes them and makes a test to make sure they never come back.

Change-Id: Ib6e94725e2716dbb2ff86f272fbe4a6987714444

specs/liberty/approved/user-data-modification.rst

@@ -51,7 +51,7 @@ REST API impact
 
 The method:
 
-"/v2/​{tenant_id}​/servers/​{server_id}"​
+"/v2/{tenant_id}/servers/{server_id}"
 
 With the method type PUT.
 

specs/liberty/implemented/show-reserved-status-in-os-fixed-ips-api.rst

@@ -75,7 +75,7 @@ minimum supported version.
     * 404: If the address on the request does not match a FixedIP entry in the
       database.
 
-  * ``/v2.1/​{tenant_id}​/os-fixed-ips/​{fixed_ip}​``
+  * ``/v2.1/{tenant_id}/os-fixed-ips/{fixed_ip}``
 
   * Parameters which can be passed via the url: The fixed IP address
 

specs/mitaka/approved/nova-api-hypervsor-cpu-info.rst

@@ -99,7 +99,7 @@ REST API impact
 
 Change in should be added in a new API microversion:
 
-`GET /v2.1/os-hypervisors/​{hypervisor_id}​`
+`GET /v2.1/os-hypervisors/{hypervisor_id}`
 
 Show hypervisor details
 Shows details for a specified hypervisor.

specs/mitaka/approved/user-data-modification.rst

@@ -51,7 +51,7 @@ REST API impact
 
 The method:
 
-"/v2/​{tenant_id}​/servers/​{server_id}"​
+"/v2/{tenant_id}/servers/{server_id}"
 
 With the method type PUT.
 

specs/newton/approved/console-log-offset.rst

@@ -54,7 +54,7 @@ if log doesn't contain this offset response should be empty.
 Request:
 
    URL:
-      /v2.1/​{tenant_id}​/servers/​{server_id}​/action
+      /v2.1/{tenant_id}/servers/{server_id}/action
 
    Method:
 

specs/newton/approved/nova-api-hypervsor-cpu-info.rst

@@ -99,7 +99,7 @@ REST API impact
 
 Change in should be added in a new API microversion:
 
-`GET /v2.1/os-hypervisors/​{hypervisor_id}​`
+`GET /v2.1/os-hypervisors/{hypervisor_id}`
 
 Show hypervisor details
 Shows details for a specified hypervisor.

tests/test_titles.py

@@ -96,6 +96,13 @@ class TestTitles(testtools.TestCase):
             "Found %s literal carriage returns in file %s" %
             (len(matches), tpl))
 
+    def _check_no_zwsp(self, tpl, raw):
+        matches = raw.decode('utf-8').find(u"\u200B")
+        self.assertEqual(
+            matches, -1,
+            "Found zero width space characters in file %s" %
+            (tpl))
+
     def _check_trailing_spaces(self, tpl, raw):
         for i, line in enumerate(raw.split("\n")):
             trailing_spaces = re.findall(" +$", line)
@@ -124,4 +131,5 @@ class TestTitles(testtools.TestCase):
                 self._check_titles(filename, template_titles, titles)
                 self._check_lines_wrapping(filename, data)
                 self._check_no_cr(filename, data)
+                self._check_no_zwsp(filename, data)
                 self._check_trailing_spaces(filename, data)