correct docstrings of go-coverage-covered and go-coverage-uncovered
correct docstrings of go-coverage-covered and go-coverage-uncovered

dominikh/go-mode.el,gorakhargosh/go-mode.el,artemave/go-mode.el,kimiby/go-mode.el,ibukanov/go-mode.el,tjyang/go-mode.el,magastzheng/go-mode.el,codemac/go-mode.el,emacsmirror/go-mode