message: [functional-tests] fix typo
  Closes:
  Approved by: vgao1996
diff: //! // check: 3
  //! // group 2:
  //! // not: 4
  -//! // check: 5
  +//! // check: bar
  //! // group 3:
  //! // not: 6
  //!
  //!
  //! // [1] abc de
  //! // [2] foo 3
  -//! // [3] 5 bar 6
  +//! // [3] bar 6
  //! // [4] 7
  //!
  //! For each group, we find the earliest place in the current entry where any of the
  //! // [2] foo 3
  //! // ^
  //! // check: 3
  -//! // [3] 5 bar 6
  +//! // [3] bar 6
  //! // ^^^ ^
  //! // | not 6
  //! // check: bar
  -//! // [5] 7
  +//! // [4] 7
  //!
  //! Note: the group matching procedure above requires searching for multiple string patterns
  //! simultatenously. Right now this is implemented using the Aho-Corasick algorithm, achieving
  