Bug 533194 - [Code mining] Cannot position the caret on 1st letter

This change the drawing strategy to draw the code mining on the right of
the previous character, so caret always is just before the next char.

Change-Id: I3951a14faafebf3d947652e8dab2a8bdde27aa13
Signed-off-by: Mickael Istria <mistria@redhat.com>
5 files changed