Are 'text-align: justify' and/or 'text-justify' supported in styles.less?

I’ve been trying for a few days to get text in my editor panes to show justified, and nothing I’ve attempted has any effect. Snippet below added to styles.less does not work at all.

atom-text-editor.editor {
  text-align: justify;
  text-justify: inter-word !important;

For reference, ‘text-align: right’ or ‘center’ both work as expected. It’s only ‘justify’ that does nothing.

Am I missing something?