Parameter order changed in docstrings

[Ryand1234]

References to other Issues or PRs or Relevant literature

Fixes #251

Brief description of what is fixed or changed

Order of parameter in docstring now matches their prototype function/class.

Other comments

[codecov]

Codecov Report

Merging #275 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #275   +/-   ##
=========================================
  Coverage   98.810%   98.810%           
=========================================
  Files           23        23           
  Lines         2353      2353           
=========================================
  Hits          2325      2325           
  Misses          28        28           

Impacted Files	Coverage Δ
...datastructs/linear_data_structures/linked_lists.py	99.596% <ø> (ø)
pydatastructs/trees/binary_trees.py	97.364% <ø> (ø)
pydatastructs/trees/heaps.py	97.927% <ø> (ø)
pydatastructs/trees/m_ary_trees.py	91.176% <ø> (ø)
pydatastructs/trees/space_partitioning_trees.py	97.656% <ø> (ø)
pydatastructs/utils/misc_util.py	100.000% <ø> (ø)

[czgdp1807]

Looks good, some minor changes are needed. Are you a GSSoC, 2020 participant.

[Ryand1234]

No, I'm not a participant

[Ryand1234]

What changes are needed?

[czgdp1807]

IMO, changes would be too subtle. Merging directly.

[czgdp1807]

Thanks.