Docs modification for better clarification

[pratikgl]

Modified Docs to resolve discrepancies

References to other Issues or PRs or Relevant literature

Fixes #406 Fixes #423

Brief description of what is fixed or changed

Other comments

[codecov[bot]]

Codecov Report

Merging #424 (32e07f5) into 0.0.1-alpha (9f22c7d) will decrease coverage by 0.050%. The diff coverage is 81.818%.

@@                Coverage Diff                @@
##           0.0.1-alpha      #424       +/-   ##
=================================================
- Coverage       98.573%   98.523%   -0.051%     
=================================================
  Files               29        29               
  Lines             3646      3657       +11     
=================================================
+ Hits              3594      3603        +9     
- Misses              52        54        +2     

Impacted Files	Coverage Δ
pydatastructs/graphs/graph.py	100.000% <ø> (ø)
pydatastructs/linear_data_structures/arrays.py	100.000% <ø> (ø)
pydatastructs/graphs/adjacency_matrix.py	97.916% <80.000%> (-2.084%)	:arrow_down:
pydatastructs/graphs/adjacency_list.py	98.000% <83.333%> (-2.000%)	:arrow_down: