bug: TAB in column 1-6 lead to move to next line + a tabulator

[GitMensch]

Description

Steps to reproduce:

• use the code

      * some comment

      * other comment

• now set the curspr to the empty line
• use tab

expected result: tabulator is (or appropriate number of spaces are) added in current cursor position, cursor moves

current result:

• cursor moves to next line
• tabulator is (or appropriate number of spaces are) added after new cursor position, cursor doesn't move "to the right"

System information

• Operating System: Windows
• OpenCobolIDE: 4.7.6
• GnuCOBOL: cobc (GnuCOBOL) 2.0.0
• Python: 3.4.4 (32bits)
• Qt: 5.5.1
• PyQt: 5.5.1
• pyqode.core: 2.11.0
• pyqode.cobol: 2.11.0
• pyqode.qt: 2.10.0
• pygments: 2.1.3
• QDarkStyle: 2.3.0