Editor: Fix finding block parentheses.
Editor: Fix finding block parentheses.

The '[' and ']' characters were considered block-opening/closing. That
led to bad results in the autocompleter (the only user of these
functions).

Task-number: QTCREATORBUG-8031
Change-Id: I81b464b2591d3695baad6e9630f9bcc4aa4ef795
Reviewed-by: Erik Verbruggen <5edfe905d082749f2ac3f4e6b42937f39f083771@digia.com>

kuba1/qtcreator,martyone/sailfish-qtcreator,danimo/qt-creator,farseerri/git_code,richardmg/qtcreator,danimo/qt-creator,darksylinc/qt-creator,duythanhphan/qt-creator,amyvmiwei/qt-creator,colede/qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,kuba1/qtcreator,duythanhphan/qt-creator,martyone/sailfish-qtcreator,richardmg/qtcreator,martyone/sailfish-qtcreator,AltarBeastiful/qt-creator,malikcjm/qtcreator,kuba1/qtcreator,colede/qtcreator,malikcjm/qtcreator,xianian/qt-creator,farseerri/git_code,martyone/sailfish-qtcreator,richardmg/qtcreator,farseerri/git_code,omniacreator/qtcreator,maui-packages/qt-creator,AltarBeastiful/qt-creator,danimo/qt-creator,danimo/qt-creator,AltarBeastiful/qt-creator,Distrotech/qtcreator,kuba1/qtcreator,farseerri/git_code,AltarBeastiful/qt-creator,Distrotech/qtcreator,omniacreator/qtcreator,farseerri/git_code,amyvmiwei/qt-creator,kuba1/qtcreator,malikcjm/qtcreator,xianian/qt-creator,xianian/qt-creator,farseerri/git_code,darksylinc/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,amyvmiwei/qt-creator,malikcjm/qtcreator,richardmg/qtcreator,Distrotech/qtcreator,martyone/sailfish-qtcreator,colede/qtcreator,amyvmiwei/qt-creator,Distrotech/qtcreator,farseerri/git_code,maui-packages/qt-creator,duythanhphan/qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,AltarBeastiful/qt-creator,richardmg/qtcreator,duythanhphan/qt-creator,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,darksylinc/qt-creator,kuba1/qtcreator,colede/qtcreator,malikcjm/qtcreator,maui-packages/qt-creator,maui-packages/qt-creator,Distrotech/qtcreator,omniacreator/qtcreator,danimo/qt-creator,maui-packages/qt-creator,richardmg/qtcreator,darksylinc/qt-creator,Distrotech/qtcreator,xianian/qt-creator,colede/qtcreator,xianian/qt-creator,kuba1/qtcreator,duythanhphan/qt-creator,darksylinc/qt-creator,darksylinc/qt-creator,Distrotech/qtcreator,richardmg/qtcreator,omniacreator/qtcreator,amyvmiwei/qt-creator,darksylinc/qt-creator,maui-packages/qt-creator,omniacreator/qtcreator,duythanhphan/qt-creator,colede/qtcreator,kuba1/qtcreator,danimo/qt-creator,kuba1/qtcreator,amyvmiwei/qt-creator,danimo/qt-creator,omniacreator/qtcreator,colede/qtcreator,darksylinc/qt-creator,danimo/qt-creator,duythanhphan/qt-creator,farseerri/git_code,malikcjm/qtcreator,xianian/qt-creator,omniacreator/qtcreator,martyone/sailfish-qtcreator,danimo/qt-creator,amyvmiwei/qt-creator,amyvmiwei/qt-creator,malikcjm/qtcreator,maui-packages/qt-creator