fix tests for pypa#12166, add news entry

- tests expected results indendation was off
- add bugfix news entry

related to fix for pypa#12166

Author: dtrifiro

news/12166.bugfix

@@ -0,0 +1 @@
+Fix completion script for zsh

tests/functional/test_completion.py

@@ -49,13 +49,13 @@
              COMP_CWORD=$((CURRENT-1)) \\
              PIP_AUTO_COMPLETE=1 $words[1] 2>/dev/null )
 }
-        if [[ $zsh_eval_context[-1] == loadautofunc ]]; then
-          # autoload from fpath, call function directly
-          __pip "$@"
-        else
-          # eval/source/. command, register function for later
-          compdef __pip -P 'pip[0-9.]#'
-        fi""",
+if [[ $zsh_eval_context[-1] == loadautofunc ]]; then
+  # autoload from fpath, call function directly
+  __pip "$@"
+else
+  # eval/source/. command, register function for later
+  compdef __pip -P 'pip[0-9.]#'
+fi""",
     ),
     (
         "powershell",