xauth: use printf instead of echo #7

Author: mviereck

runx

@@ -1,7 +1,7 @@
 #! /bin/bash
 # runx: Provide an X server in Cygwin, MSYS2 or WSL.
 
-Version="v0.4.10"
+Version="v0.4.11"
 
 usage() {                       # Usage information (--help)
   echo "runx - Run Linux GUI applications on MS Windows.
@@ -514,8 +514,8 @@ setup_cookie() {                # Generate X authentication cookie
     xauth -i -f "$Xclientcookie" add :$Newdisplaynumber . $(mcookie)
     # prepare cookie with localhost identification disabled by ffff. ffff means 'familiy wild'
     Cookie="$(xauth -i -f "$Xclientcookie" nlist | sed -e 's/^..../ffff/')"
-    echo "$Cookie" | xauth -i -f "$Xclientcookie" nmerge -
-    echo "$Cookie" | xauth -i -f "$Xservercookie" nmerge -
+    printf "$Cookie" | xauth -i -f "$Xclientcookie" nmerge -
+    printf "$Cookie" | xauth -i -f "$Xservercookie" nmerge -
 
     verbose "Client cookie:
 $(xauth -v -f "$Xclientcookie" list)"