Fix trailing whitespace in the powershell completion script (#1342)

Signed-off-by: Paul Holzinger <paul.holzinger@web.de>
diff --git a/powershell_completions.go b/powershell_completions.go
index c55be71..383ad74 100644
--- a/powershell_completions.go
+++ b/powershell_completions.go
@@ -86,7 +86,7 @@
         # We add an extra empty parameter so we can indicate this to the go method.
         __%[1]s_debug "Adding extra empty parameter"
 `+"        # We need to use `\"`\" to pass an empty argument a \"\" or '' does not work!!!"+`
-`+"        $RequestComp=\"$RequestComp\" + ' `\"`\"' "+`
+`+"        $RequestComp=\"$RequestComp\" + ' `\"`\"'"+`
     }
 
     __%[1]s_debug "Calling $RequestComp"