added word boundaries when replacing uptime_xxx variables (2)

use perl instead of sead as on macOS sed doesn't support \b to match word boundaries

.tmux.conf

@@ -1242,20 +1242,20 @@ run 'cut -c3- ~/.tmux.conf | sh -s _apply_configuration'
 #   _pkillf 'cut -c3- ~/\.tmux\.conf \| sh -s _uptime'
 #   case "$status_left $status_right" in
 #     *'#{uptime_'*|*'#{?uptime_'*)
-#       status_left=$(echo "$status_left" | sed -E \
-#         -e 's/#\{(\?)?uptime_y\b/#\{\1@uptime_y/g' \
-#         -e 's/#\{(\?)?uptime_d\b/#\{\1@uptime_d/g' \
-#         -e '/@uptime_y/ s/@uptime_d/@uptime_dy/g' \
-#         -e 's/#\{(\?)?uptime_h/#\{\1@uptime_h/g' \
-#         -e 's/#\{(\?)?uptime_m\b/#\{\1@uptime_m/g' \
-#         -e 's/#\{(\?)?uptime_s\b/#\{\1@uptime_s/g')
-#       status_right=$(echo "$status_right" | sed -E \
-#         -e 's/#\{(\?)?uptime_y\b/#\{\1@uptime_y/g' \
-#         -e 's/#\{(\?)?uptime_d\b/#\{\1@uptime_d/g' \
-#         -e '/@uptime_y/ s/@uptime_d/@uptime_dy/g' \
-#         -e 's/#\{(\?)?uptime_h\b/#\{\1@uptime_h/g' \
-#         -e 's/#\{(\?)?uptime_m\b/#\{\1@uptime_m/g' \
-#         -e 's/#\{(\?)?uptime_s\b/#\{\1@uptime_s/g')
+#       status_left=$(echo "$status_left" | perl -p -e '
+#         ; s/#\{(\?)?uptime_y\b/#\{\1\@uptime_y/g
+#         ; s/#\{(\?)?uptime_d\b/#\{\1\@uptime_d/g
+#         ; s/\@uptime_d\b/\@uptime_dy/g if /\@uptime_y\b/
+#         ; s/#\{(\?)?uptime_h\b/#\{\1\@uptime_h/g
+#         ; s/#\{(\?)?uptime_m\b/#\{\1\@uptime_m/g
+#         ; s/#\{(\?)?uptime_s\b/#\{\1\@uptime_s/g')
+#       status_right=$(echo "$status_right" | perl -p -e '
+#         ; s/#\{(\?)?uptime_y\b/#\{\1\@uptime_y/g
+#         ; s/#\{(\?)?uptime_d\b/#\{\1\@uptime_d/g
+#         ; s/\@uptime_d\b/\@uptime_dy/g if /\@uptime_y\b/
+#         ; s/#\{(\?)?uptime_h\b/#\{\1\@uptime_h/g
+#         ; s/#\{(\?)?uptime_m\b/#\{\1\@uptime_m/g
+#         ; s/#\{(\?)?uptime_s\b/#\{\1\@uptime_s/g')
 #       interval=60
 #       case "$status_left $status_right" in
 #         *'#{@uptime_s}'*)