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Addressing Hashtags and @mentions

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Added both cases in the bonus section
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Falak 2017-07-30 23:01:14 +05:30 committed by GitHub
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@ -482,7 +482,8 @@ line. And because of `m` flag now regular expression engine matches pattern at t
* *Date (MM/DD/YYYY)*: `^(0?[1-9]|1[012])[- /.](0?[1-9]|[12][0-9]|3[01])[- /.](19|20)?[0-9]{2}$`
* *Date (YYYY/MM/DD)*: `^(19|20)?[0-9]{2}[- /.](0?[1-9]|1[012])[- /.](0?[1-9]|[12][0-9]|3[01])$`
* *MasterCard credit card numbers*: `^(5[1-5][0-9]{14})*$`
* *Hashtags*: Including hashtags with preceding text (abc123#xyz456) or containing white spaces within square brackets (#[foo bar]) : `\S*#(?:\[[^\]]+\]|\S+)`
* *@mentions*: `\B@[a-z0-9_-]+`
## Contribution
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