Fixed the duplicate BR problem - only add a BR to an empty-text paragraph if it does not already end with a BR.
Fixed the duplicate BR problem - only add a BR to an empty-text paragraph if it does not
already end with a BR.

corinthia/corinthia-editorlib,corinthia/corinthia-editor,corinthia/corinthia-editorlib,corinthia/corinthia-editor,corinthia/corinthia-editorlib,corinthia/corinthia-editor,corinthia/corinthia-editor,corinthia/corinthia-editorlib,corinthia/corinthia-editorlib,corinthia/corinthia-editor