While reviewing diff of options_description.cpp rev 1.14 and 1.17 , I came across of potential bug in line 417: 417 : (line_length - indent) / 2) However, line_length already had been decrease by "indent" in line 332 ( introduced in rev 1.15) I assume that correction is: 417 : (line_length) / 2) Regards Stas Khirman