Fix and make command format more consistent

[sikai00]

Closes #275.

[codecov-commenter]

Codecov Report

Base: 59.89% // Head: 59.92% // Increases project coverage by +0.03% 🎉

Coverage data is based on head (6573ba3) compared to base (ef24a62).
Patch coverage: 75.00% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #288      +/-   ##
============================================
+ Coverage     59.89%   59.92%   +0.03%     
- Complexity      614      616       +2     
============================================
  Files           113      113              
  Lines          2254     2256       +2     
  Branches        249      249              
============================================
+ Hits           1350     1352       +2     
  Misses          821      821              
  Partials         83       83              

Impacted Files	Coverage Δ
...eedu/address/logic/commands/AddMeetingCommand.java	0.00% <0.00%> (ø)
...du/address/logic/commands/DeleteClientCommand.java	100.00% <ø> (ø)
...u/address/logic/commands/DeleteProductCommand.java	100.00% <ø> (ø)
...eedu/address/logic/commands/EditClientCommand.java	89.47% <ø> (ø)
...edu/address/logic/commands/EditMeetingCommand.java	0.00% <ø> (ø)
...eedu/address/logic/commands/ViewClientCommand.java	100.00% <ø> (ø)
...edu/address/logic/commands/ViewMeetingCommand.java	92.30% <ø> (ø)
...seedu/address/logic/commands/AddClientCommand.java	88.23% <100.00%> (ø)
...eedu/address/logic/commands/AddProductCommand.java	91.66% <100.00%> (ø)
...u/address/logic/commands/DeleteMeetingCommand.java	100.00% <100.00%> (ø)
... and 1 more

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