Indents the current line in the document to the indent level of the
start of the previous line, plus the given suffix.
version: $Id: ActionStartPrevLinePlus.java 4255 2007-08-28 19:17:37Z mgricken $
Indents the line according to the previous line, with the suffix string added.
If on the first line, indent is set to 0.
Parameters: doc - AbstractDJDocument containing the line to be indented. Parameters: reason - The reason that the indentation is taking place true if the caller should update the current location itself,false if the indenter has already handled this
Fields inherited from edu.rice.cs.drjava.model.definitions.indent.IndentRuleWithTrace