minor changes for documentation in biconnected function

[MeherChaitanya04]

[codecov-io]

Codecov Report

Merging #40 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #40   +/-   ##
=======================================
  Coverage   86.69%   86.69%           
=======================================
  Files          20       20           
  Lines        1646     1646           
=======================================
  Hits         1427     1427           
  Misses        219      219

Impacted Files	Coverage Δ
src/biconnected.jl	90.36% <ø> (ø)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 3f01b23...f358084. Read the comment docs.