[v1.4.1] Change gender to sex, change email regex, change find to substring implementation

[constancensq]

No description provided.

[codecov-io]

Codecov Report

Merging #228 into master will decrease coverage by 0.01%.
The diff coverage is 66.91%.

@@             Coverage Diff              @@
##             master     #228      +/-   ##
============================================
- Coverage     59.81%   59.79%   -0.02%     
+ Complexity      740      732       -8     
============================================
  Files           140      140              
  Lines          2966     2980      +14     
  Branches        424      421       -3     
============================================
+ Hits           1774     1782       +8     
- Misses         1033     1036       +3     
- Partials        159      162       +3     

Impacted Files	Coverage Δ	Complexity Δ
...in/java/seedu/pivot/logic/commands/AddCommand.java	100.00% <ø> (ø)	1.00 <0.00> (ø)
.../seedu/pivot/logic/commands/EditPersonCommand.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...ic/commands/suspectcommands/AddSuspectCommand.java	89.65% <ø> (ø)	9.00 <0.00> (ø)
...c/commands/suspectcommands/EditSuspectCommand.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...ogic/commands/victimcommands/AddVictimCommand.java	89.65% <ø> (ø)	9.00 <0.00> (ø)
...gic/commands/victimcommands/EditVictimCommand.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...ic/commands/witnesscommands/AddWitnessCommand.java	89.65% <ø> (ø)	9.00 <0.00> (ø)
...c/commands/witnesscommands/EditWitnessCommand.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...u/pivot/logic/parser/EditSuspectCommandParser.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
...du/pivot/logic/parser/EditVictimCommandParser.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
... and 23 more

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