[news.eclipse.technology.imp] Toggle comment behavior in LPG editor

[Brian Payton <bpayton@xxxxxxxxxx>]

Here's a minor fit'n'finish item I came across in the LPG source editor.

In the editor, the "Toggle comment" action (Ctrl+/) adds LPG comments in 
a way that is kind of ugly.  Let's say you have a rule like this:

col_expr_cl ::=
       col_expr_spec
     | col_expr_cl , col_expr_spec

The toggle comment action does this:

-- col_expr_cl ::=
      -- col_expr_spec
    -- | col_expr_cl , col_expr_spec

The equivalent action in the Java editor works a little differently.  If 
you toggle comments on this:

    if (uniqueOpt != null) {
        index.setUnique(true);
    }

you get this:

//    if (uniqueOpt != null) {
//        index.setUnique(true);
//    }

which I think makes it easier to spot sections of code that are 
commented out.