Fixes #1594: Add test for CommonPattern.java

[simsausaurabh]

Short description

I have:

• [X] There is a corresponding issue for this pull request.
• [X] Mentioned the Issue number in the pull request commit message Fixes #<number> commit message
• [X] There is only strictly only one commit per issue.

For the reviewers

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• [ ] Reviewed this pull request by an authorized contributor.
• [ ] The reviewer is assigned to the pull request.

Fixes: #1594

[codecov-io]

Codecov Report

Merging #1595 into development will increase coverage by 0.02%. The diff coverage is n/a.

@@               Coverage Diff                @@
##             development   #1595      +/-   ##
================================================
+ Coverage           9.69%   9.71%   +0.02%     
- Complexity           462     464       +2     
================================================
  Files                210     210              
  Lines              19279   19279              
  Branches            3541    3541              
================================================
+ Hits                1869    1873       +4     
+ Misses             17079   17076       -3     
+ Partials             331     330       -1

Impacted Files	Coverage Δ	Complexity Δ
src/org/loklak/api/search/QuoraProfileScraper.java	43.66% <0%> (+1.31%)	13% <0%> (+1%)	:arrow_up:
src/org/loklak/tools/CommonPattern.java	100% <0%> (+5.88%)	2% <0%> (+1%)	:arrow_up:

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[simsausaurabh]

@singhpratyush please review.