Minor code improvement in tg-agent::fmt-time and tg-agent::pretty-fmt-time
Minor code improvement in tg-agent::fmt-time and tg-agent::pretty-fmt-time

cl-test-grid/cl-test-grid,cl-test-grid/cl-test-grid,cl-test-grid/cl-test-grid,cl-test-grid/cl-test-grid,cl-test-grid/cl-test-grid