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@@ -58,7 +58,7 @@ export default class FontFamilyCommand extends Command {
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const ranges = model.schema.getValidRanges( selection.getRanges(), 'fontFamily' );
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for ( const range of ranges ) {
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- if ( value !== 'default' ) {
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+ if ( value && value !== 'default' ) {
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writer.setAttribute( 'fontFamily', value, range );
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} else {
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writer.removeAttribute( 'fontFamily', range );
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