message: fix an error completion of `cargo run --example`
diff: @@ -184,7 +184,10 @@ _benchmark_names()
  }
  _get_examples(){
  - local files=($(dirname $(_locate_manifest))/examples/*.rs)
  + local manifest=$(_locate_manifest)
  + [ -z "$manifest" ] && return 0
  +
  + local files=("${manifest%/*}"/examples/*.rs)
  local names=("${files[@]##*/}")
  local names=("${names[@]%.*}")
  # "*" means no examples found
  