Do not skip over strings when checking for dangling operator
Do not skip over strings when checking for dangling operator

Closes gh-14

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