When indent_size is "tab", set shiftwidth's value to tabstop's value.
When indent_size is "tab", set shiftwidth's value to tabstop's value.

johnfraney/editorconfig-vim,pocke/editorconfig-vim,pocke/editorconfig-vim,benjifisher/editorconfig-vim,johnfraney/editorconfig-vim,benjifisher/editorconfig-vim,VictorBjelkholm/editorconfig-vim,pocke/editorconfig-vim,johnfraney/editorconfig-vim,benjifisher/editorconfig-vim,VictorBjelkholm/editorconfig-vim,VictorBjelkholm/editorconfig-vim