Edit lesson command

[ruixuantan]

Resolves #120

[codecov-io]

Codecov Report

Merging #143 into master will increase coverage by 0.41%.
The diff coverage is 90.98%.

@@             Coverage Diff              @@
##             master     #143      +/-   ##
============================================
+ Coverage     80.16%   80.57%   +0.41%     
- Complexity      894      920      +26     
============================================
  Files           134      136       +2     
  Lines          2581     2693     +112     
  Branches        282      309      +27     
============================================
+ Hits           2069     2170     +101     
- Misses          439      440       +1     
- Partials         73       83      +10     

Impacted Files	Coverage Δ	Complexity Δ
...du/address/logic/commands/DeleteLessonCommand.java	77.77% <33.33%> (-4.58%)	11.00 <0.00> (ø)
...eedu/address/logic/commands/EditLessonCommand.java	91.76% <91.76%> (ø)	17.00 <17.00> (?)
.../address/logic/parser/EditLessonCommandParser.java	92.30% <92.30%> (ø)	8.00 <8.00> (?)
...ava/seedu/address/commons/util/CollectionUtil.java	94.44% <100.00%> (ø)	9.00 <0.00> (ø)
...address/logic/commands/EditModuleClassCommand.java	95.65% <100.00%> (-0.10%)	12.00 <1.00> (ø)
...edu/address/logic/commands/EditStudentCommand.java	96.82% <100.00%> (-0.05%)	12.00 <0.00> (ø)
...in/java/seedu/address/logic/parser/ParserUtil.java	93.58% <100.00%> (ø)	22.00 <0.00> (ø)
...va/seedu/address/logic/parser/TutorsPetParser.java	100.00% <100.00%> (ø)	29.00 <0.00> (+1.00)
src/main/java/seedu/address/model/lesson/Day.java	100.00% <100.00%> (ø)	4.00 <3.00> (ø)
...a/seedu/address/model/moduleclass/ModuleClass.java	100.00% <100.00%> (ø)	18.00 <1.00> (ø)
... and 2 more

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[junlong4321]

Overall LGTM, consider adding the assertion to AddLessonCommand and DeleteLessonCommand as well

[ypinhsuan]

Nice work! LGTM