IDEA-59266 successive usage of the "comment code fragment" adds new comments instead of toggling them
testdata for IDEA-60875
testdata for IDEA-71645
testdata for IDEA-70890
testdata for IDEA-67998
testdata for IDEA-63731
testdata for IDEA-18425
testdata for IDEA-62056
testdata for IDEA-27185
testdata for IDEA-27080
testdata for IDEA-22079
testdata for IDEA-21602
testdata for IDEA-21597
testdata fo IDEA-20573
testdata for IDEA-20244
introduce variable from expression with errors