Bug 50212 [formatting] Repeated insertion of new line when formatting javadoc comment
Formatting the following javadoc comment multiple times results in the insertion of a new line before 'test' *each* time: /** * <pre></pre> * test */
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/comment/CommentRegion.java
protected void markRegion() {
		
	}
	/**
	 * Set the border <code>border</code> to true.
	 * 
	 * @param border
	 *                  The type of the border. Must be a border attribute of <code>CommentRegion</code>.
	 */
	protected final void setBorder(final int border) {
		fBorders |= border;
	}
	/**
	 * Returns the indentation string for a reference string
	 * 
	 * @param reference
	 *                  The reference string to get the indentation string for
	 * @param tabs
	 *                  <code>true</code> iff the indent should use tabs, <code>false</code>
	 *                  otherwise.
	 * @return The indentation string
	 */
	protected final String stringToIndent(final String reference, final boolean tabs) {
		int space= 1;
		int pixels= reference.length();
		if (fGraphics != null) {
			pixels= stringToPixels(reference);
			space= fGraphics.stringExtent(" ").x; 
		}
		final StringBuffer buffer= new StringBuffer();