Fix bug in list command

[florenciamartina]

No description provided.

[codecov-io]

Codecov Report

Merging #123 into master will increase coverage by 0.02%.
The diff coverage is 71.42%.

@@             Coverage Diff              @@
##             master     #123      +/-   ##
============================================
+ Coverage     74.22%   74.25%   +0.02%     
- Complexity      700      704       +4     
============================================
  Files           107      108       +1     
  Lines          1971     1977       +6     
  Branches        230      231       +1     
============================================
+ Hits           1463     1468       +5     
  Misses          437      437              
- Partials         71       72       +1     

Impacted Files	Coverage Δ	Complexity Δ
...main/java/seedu/address/commons/core/Messages.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
...java/seedu/address/logic/commands/ListCommand.java	83.33% <0.00%> (-16.67%)	3.00 <1.00> (+1.00)	⬇️
.../seedu/address/logic/parser/AddressBookParser.java	78.57% <0.00%> (ø)	18.00 <0.00> (ø)
.../seedu/address/logic/parser/ListCommandParser.java	100.00% <100.00%> (ø)	3.00 <3.00> (?)

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[erinmayg]

Other than a few minor changes, LGTM! 😄

[drake25122000]

LGTM