Add test cases for commons.util.StringUtil.limitString()

[mingyi456]

No description provided.

[codecov-commenter]

Codecov Report

Merging #137 (078a1a5) into master (19e2c3a) will increase coverage by 0.54%.
The diff coverage is 75.75%.

@@             Coverage Diff              @@
##             master     #137      +/-   ##
============================================
+ Coverage     58.14%   58.68%   +0.54%     
- Complexity      563      601      +38     
============================================
  Files           110      121      +11     
  Lines          2377     2561     +184     
  Branches        229      251      +22     
============================================
+ Hits           1382     1503     +121     
- Misses          916      966      +50     
- Partials         79       92      +13     

Impacted Files	Coverage Δ
...ava/seedu/address/logic/commands/ClearCommand.java	54.54% <ø> (ø)
...java/seedu/address/logic/commands/ExitCommand.java	100.00% <ø> (ø)
...java/seedu/address/logic/commands/ListCommand.java	70.00% <ø> (ø)
...java/seedu/address/logic/commands/UndoCommand.java	57.14% <ø> (ø)
.../java/seedu/address/logic/parser/ArgumentType.java	0.00% <0.00%> (ø)
.../seedu/address/logic/parser/TaskCommandParser.java	0.00% <0.00%> (ø)
...ser/exceptions/ArgumentContainsSlashException.java	0.00% <0.00%> (ø)
...in/java/seedu/address/storage/JsonAdaptedTask.java	0.00% <0.00%> (ø)
src/main/java/seedu/address/ui/EditTaskDialog.java	0.00% <0.00%> (ø)
src/main/java/seedu/address/ui/TaskCard.java	0.00% <0.00%> (ø)
... and 36 more

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[jeffsieu]

LGTM