id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,difficulty 1189,string-substitute \NUM syntax with preceding backslashes,John Foerch,,"I'm seeing an odd behavior with string-substitute. I want to prefix commas in a string with backslashes, but found the following behavior: {{{ > (use regex) > (string-substitute #\, ""\\ \\0"" ""a,b"") ""a\\ ,b"" > (string-substitute #\, ""\\\\0"" ""a,b"") ""a\\\\0b"" }}} The \NUM syntax in the substitution string worked as expected when preceded by a space, but not when preceded by another backslash (which was escaped). CHICKEN version 4.9.0.1 regex version 1.0 ",defect,closed,major,4.11.0,extensions,4.9.x,invalid,,,