add a news file

Author: frostming

news/9024.feature.rst

@@ -0,0 +1 @@
+Add support for Powershell autocompletion.

tests/functional/test_completion.py

@@ -47,25 +47,25 @@
         "posh",
         """\
 if ((Test-Path Function:\\TabExpansion) -and -not `
-    (Test-Path Function:\\_pip_completeBackup)) {{
+    (Test-Path Function:\\_pip_completeBackup)) {
     Rename-Item Function:\\TabExpansion _pip_completeBackup
-}}
-function TabExpansion($line, $lastWord) {{
+}
+function TabExpansion($line, $lastWord) {
     $lastBlock = [regex]::Split($line, '[|;]')[-1].TrimStart()
-    if ($lastBlock.StartsWith("{prog} ")) {{
+    if ($lastBlock.StartsWith("pip ")) {
         $Env:COMP_WORDS=$lastBlock
         $Env:COMP_CWORD=$lastBlock.Split().Length - 1
         $Env:PIP_AUTO_COMPLETE=1
-        (& {prog}).Split()
+        (& pip).Split()
         Remove-Item Env:COMP_WORDS
         Remove-Item Env:COMP_CWORD
         Remove-Item Env:PIP_AUTO_COMPLETE
-    }}
-    elseif (Test-Path Function:\\_pip_completeBackup) {{
+    }
+    elseif (Test-Path Function:\\_pip_completeBackup) {
         # Fall back on existing tab expansion
         _pip_completeBackup $line $lastWord
-    }}
-}}""",
+    }
+}""",
     ),
 )