Trim trailing newlines in interactive mode.

CHANGELOG.md

@@ -13,6 +13,7 @@
 - Use single quotes for attributes in stanzas created by github.com/beevik/etree (vial etree v1.1.4).
 - Fix SRV lookup when the domain has a CNAME (via xmppsrv v0.2.5).
 - Fall back to directTLS on port 5223 (instead of StartTLS on port 5222) if no SRV records are provided and `-t` is set.
+- Remove trailing newlines in interactive mode.
 
 ## [v0.5.6] 2022-11-11
 ### Added

main.go

@@ -443,6 +443,7 @@ func main() {
 		reader := bufio.NewReader(os.Stdin)
 		for {
 			message, err = reader.ReadString('\n')
+			message = strings.TrimSuffix(message, "\n")
 			if errors.Unwrap(err) != nil {
 				log.Fatal("failed to read from stdin")
 			}