Fix typo when creating hostname tag for title

dotfiles/bash/post.bashrc

@@ -105,7 +105,7 @@ __bashum__mkpc() {
 __bashum__mkhostid() {
     test -n "$SSH_CONNECTION" || return
     echo "__bashum__mkhostid(): HOSTNAME='$HOSTNAME'" >&2
-    echo"${HOSTNAME%%.*}:"
+    echo "${HOSTNAME%%.*}:"
 }
 
 __bashum__setup_traps() {