minor revision to ex. 1.1.8, configuration; remove tour of the repl section, deprecated by ex. 1.1.2
minor revision to ex. 1.1.8, configuration; remove tour of the repl section, deprecated by ex. 1.1.2

tang-junjie/llthw,tang-junjie/llthw,LispTO/llthw,tang-junjie/llthw,LispTO/llthw,LispTO/llthw