[python mode] Fix indentation tracking
[python mode] Fix indentation tracking

Issue #3794

dperetti/CodeMirror,grzegorzmazur/CodeMirror,jkaplon/CodeMirror,bfrohs/CodeMirror,SidPresse/CodeMirror,sourcelair/CodeMirror,InternetGuru/CodeMirror,pabloferz/CodeMirror,nightwing/CodeMirror,mizchi/CodeMirror,mizchi/CodeMirror,ficristo/CodeMirror,SidPresse/CodeMirror,crazy4chrissi/CodeMirror,SidPresse/CodeMirror,InternetGuru/CodeMirror,thomasjm/CodeMirror,alur/CodeMirror,dperetti/CodeMirror,namin/CodeMirror,wingify/CodeMirror,mtaran-google/CodeMirror,jkaplon/CodeMirror,TDaglis/CodeMirror,ejgallego/CodeMirror,ficristo/CodeMirror,nightwing/CodeMirror,hccampos/CodeMirror,ejgallego/CodeMirror,rrandom/CodeMirror,thomasjm/CodeMirror,mtaran-google/CodeMirror,bfrohs/CodeMirror,wingify/CodeMirror,nightwing/CodeMirror,Dominator008/CodeMirror,kerabromsmu/CodeMirror,rrandom/CodeMirror,ashmind/CodeMirror,crazy4chrissi/CodeMirror,INTELOGIE/CodeMirror,Jisuanke/CodeMirror,adobe/CodeMirror2,vincentwoo/CodeMirror,grzegorzmazur/CodeMirror,hackmdio/CodeMirror,notepadqq/CodeMirror,hccampos/CodeMirror,vincentwoo/CodeMirror,schanzer/CodeMirror,INTELOGIE/CodeMirror,wingify/CodeMirror,crazy4chrissi/CodeMirror,codio/CodeMirror,antimatter15/CodeMirror,Jisuanke/CodeMirror,xeronith/CodeMirror,InternetGuru/CodeMirror,sourcelair/CodeMirror,hackmdio/CodeMirror,adobe/CodeMirror2,xeronith/CodeMirror,jkaplon/CodeMirror,notepadqq/CodeMirror,ejgallego/CodeMirror,jayaprabhakar/CodeMirror,INTELOGIE/CodeMirror,xeronith/CodeMirror,kerabromsmu/CodeMirror,codio/CodeMirror,schanzer/CodeMirror,grzegorzmazur/CodeMirror,namin/CodeMirror,sourcelair/CodeMirror,schanzer/CodeMirror,thomasjm/CodeMirror,MarcelGerber/CodeMirror,ficristo/CodeMirror,jayaprabhakar/CodeMirror,antimatter15/CodeMirror,ashmind/CodeMirror,rrandom/CodeMirror,ashmind/CodeMirror,kerabromsmu/CodeMirror,jayaprabhakar/CodeMirror,Jisuanke/CodeMirror,namin/CodeMirror,codio/CodeMirror,Dominator008/CodeMirror,Dominator008/CodeMirror,TDaglis/CodeMirror,hccampos/CodeMirror,mtaran-google/CodeMirror,pabloferz/CodeMirror,MarcelGerber/CodeMirror,dperetti/CodeMirror,antimatter15/CodeMirror,pabloferz/CodeMirror,alur/CodeMirror,bfrohs/CodeMirror,vincentwoo/CodeMirror,alur/CodeMirror,mizchi/CodeMirror,notepadqq/CodeMirror,hackmdio/CodeMirror,TDaglis/CodeMirror,adobe/CodeMirror2,MarcelGerber/CodeMirror