elvish: register .exe completion on windows

internal/shell/elvish/snippet.go

@@ -3,14 +3,15 @@ package elvish
 
 import (
 	"fmt"
+	"runtime"
 
 	"github.com/carapace-sh/carapace/pkg/uid"
 	"github.com/spf13/cobra"
 )
 
 // Snippet creates the elvish completion script.
 func Snippet(cmd *cobra.Command) string {
-	return fmt.Sprintf(`set edit:completion:arg-completer[%v] = {|@arg|
+	result := fmt.Sprintf(`set edit:completion:arg-completer[%v] = {|@arg|
     %v _carapace elvish (all $arg) | from-json | each {|completion|
 		put $completion[Messages] | all (one) | each {|m|
 			edit:notify (styled "error: " red)$m
@@ -28,4 +29,9 @@ func Snippet(cmd *cobra.Command) string {
     }
 }
 `, cmd.Name(), uid.Executable())
+
+	if runtime.GOOS == "windows" {
+		result += fmt.Sprintf("set edit:completion:arg-completer[%v.exe] = $edit:completion:arg-completer[%v]\n", cmd.Name(), cmd.Name())
+	}
+	return result
 }