Tidy up comments

[kirk-baird]

What has been done

Just some minor typos in comments :)

[codecov-commenter]

Codecov Report

Merging #405 into master will decrease coverage by 0.75%.
The diff coverage is 89.37%.

@@            Coverage Diff             @@
##           master     #405      +/-   ##
==========================================
- Coverage   61.97%   61.23%   -0.74%     
==========================================
  Files          43       43              
  Lines        3008     2672     -336     
==========================================
- Hits         1864     1636     -228     
+ Misses        987      880     -107     
+ Partials      157      156       -1     

Impacted Files	Coverage Δ
retrievalmarket/impl/client.go	65.34% <ø> (-2.12%)	⬇️
retrievalmarket/impl/provider.go	76.11% <ø> (-0.87%)	⬇️
retrievalmarket/types.go	41.47% <ø> (-0.90%)	⬇️
storagemarket/impl/client.go	1.60% <0.00%> (-1.29%)	⬇️
storagemarket/impl/provider.go	1.66% <0.00%> (-1.33%)	⬇️
storagemarket/impl/clientutils/clientutils.go	75.00% <66.67%> (-4.31%)	⬇️
retrievalmarket/network/libp2p_impl.go	82.61% <100.00%> (+0.39%)	⬆️
storagemarket/impl/clientstates/client_states.go	88.29% <100.00%> (-1.08%)	⬇️
storagemarket/impl/providerstates/provider_fsm.go	90.91% <100.00%> (ø)
...oragemarket/impl/providerstates/provider_states.go	83.71% <100.00%> (-1.01%)	⬇️
... and 43 more

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[hannahhoward]

Thank you!