Add URL encoding for multiple GET parameters (#645)

* Fix Bug in rest_client: Add & if params already in URL

* Fix the fix :)

* Update to #645

* Fix black formatting

Co-authored-by: Slamaris Dimitrios (Bosch PSIRT) <Dimitrios.Slamaris@de.bosch.com>
Co-authored-by: dimi <no@mail.localdomain>

Author: 3 people

atlassian/rest_client.py

@@ -195,8 +195,11 @@ def request(
         """
         url = self.url_joiner(None if absolute else self.url, path, trailing)
         params_already_in_url = True if "?" in url else False
-        if (params or flags) and not params_already_in_url:
-            url += "?"
+        if params or flags:
+            if params_already_in_url:
+                url += "&"
+            else:
+                url += "?"
         if params:
             url += urlencode(params or {})
         if flags: