replaced printf '\n' calls by echo calls, fixes #479

TPM plugins further editing status-left or status-right may alter the content
in such a way that the line feed character becomes a space

.tmux.conf

@@ -1213,12 +1213,12 @@ run 'cut -c3- ~/.tmux.conf | sh -s _apply_configuration'
 #           -e 's/#\{(\?)?battery_vbar/#\{\1@battery_vbar/g' \
 #           -e 's/#\{(\?)?battery_status/#\{\1@battery_status/g' \
 #           -e 's/#\{(\?)?battery_percentage/#\{\1@battery_percentage/g')
-#         status_right="#(printf '\n'; nice cut -c3- ~/.tmux.conf | sh -s _battery_status \"$tmux_conf_battery_status_charging\" \"$tmux_conf_battery_status_discharging\")$status_right"
+#         status_right="#(echo; nice cut -c3- ~/.tmux.conf | sh -s _battery_status \"$tmux_conf_battery_status_charging\" \"$tmux_conf_battery_status_discharging\")$status_right"
 #         interval=60
 #         if [ $_tmux_version -ge 320 ]; then
 #           tmux run -b "trap 'exit 0' TERM; while :; do nice cut -c3- ~/.tmux.conf | sh -s _battery_bar \"$tmux_conf_battery_bar_symbol_full\" \"$tmux_conf_battery_bar_symbol_empty\" \"$tmux_conf_battery_bar_length\" \"$tmux_conf_battery_bar_palette\" \"$tmux_conf_battery_hbar_palette\" \"$tmux_conf_battery_vbar_palette\"; sleep $interval; done"
 #         elif [ $_tmux_version -gt 240 ]; then
-#           status_right="#(printf '\n'; while :; do nice cut -c3- ~/.tmux.conf | sh -s _battery_bar \"$tmux_conf_battery_bar_symbol_full\" \"$tmux_conf_battery_bar_symbol_empty\" \"$tmux_conf_battery_bar_length\" \"$tmux_conf_battery_bar_palette\" \"$tmux_conf_battery_hbar_palette\" \"$tmux_conf_battery_vbar_palette\"; sleep $interval; done)$status_right"
+#           status_right="#(echo; while :; do nice cut -c3- ~/.tmux.conf | sh -s _battery_bar \"$tmux_conf_battery_bar_symbol_full\" \"$tmux_conf_battery_bar_symbol_empty\" \"$tmux_conf_battery_bar_length\" \"$tmux_conf_battery_bar_palette\" \"$tmux_conf_battery_hbar_palette\" \"$tmux_conf_battery_vbar_palette\"; sleep $interval; done)$status_right"
 #         else
 #           status_right="#(nice cut -c3- ~/.tmux.conf | sh -s _battery_bar \"$tmux_conf_battery_bar_symbol_full\" \"$tmux_conf_battery_bar_symbol_empty\" \"$tmux_conf_battery_bar_length\" \"$tmux_conf_battery_bar_palette\" \"$tmux_conf_battery_hbar_palette\" \"$tmux_conf_battery_vbar_palette\")$status_right"
 #         fi
@@ -1271,7 +1271,7 @@ run 'cut -c3- ~/.tmux.conf | sh -s _apply_configuration'
 #       if [ $_tmux_version -ge 320 ]; then
 #         tmux run -b "trap 'exit 0' TERM; while :; do nice cut -c3- ~/.tmux.conf | sh -s _uptime; sleep $interval; done"
 #       elif [ $_tmux_version -gt 240 ]; then
-#         status_right="#(printf '\n'; while :; do nice cut -c3- ~/.tmux.conf | sh -s _uptime; sleep $interval; done)$status_right"
+#         status_right="#(echo; while :; do nice cut -c3- ~/.tmux.conf | sh -s _uptime; sleep $interval; done)$status_right"
 #       else
 #         status_right="#(nice cut -c3- ~/.tmux.conf | sh -s _uptime)$status_right"
 #       fi
@@ -1289,7 +1289,7 @@ run 'cut -c3- ~/.tmux.conf | sh -s _apply_configuration'
 #       if [ $_tmux_version -ge 320 ]; then
 #         tmux run -b "trap 'exit 0' TERM; while :; do nice cut -c3- ~/.tmux.conf | sh -s _loadavg; sleep $interval; done"
 #       elif [ $_tmux_version -gt 240 ]; then
-#         status_right="#(printf '\n'; while :; do nice cut -c3- ~/.tmux.conf | sh -s _loadavg; sleep $interval; done)$status_right"
+#         status_right="#(echo; while :; do nice cut -c3- ~/.tmux.conf | sh -s _loadavg; sleep $interval; done)$status_right"
 #       else
 #         status_right="#(nice cut -c3- ~/.tmux.conf | sh -s _loadavg)$status_right"
 #       fi