import sublime, sublime_plugin

class PasteFixCommand(sublime_plugin.TextCommand):
    def run(self, edit):
        s = sublime.get_clipboard().replace("«", '"').replace("»", '"')
        pos = self.view.sel()[0].begin()
        reg = sublime.Region(self.view.sel()[0].begin(), self.view.sel()[-1].end())
        self.view.erase(edit, reg)
        self.view.insert(edit, pos, s)