Fix for #614

[D-Groenewegen]

Fix for #614. When no template is used, removes the html (a div element with the 'srf-incoming' class) from the result so that it allows for further reuse.

[gesinn-it-gea]

Thanks for your PR! At the moment, the changed file is not covered by any tests: https://app.codecov.io/gh/SemanticMediaWiki/SemanticResultFormats/blob/master/formats%2Fincoming%2FSRF_Incoming.php. Do you think you can add some testing?

[D-Groenewegen]

Apologies for the delay - I was hit with the man flu shortly afterwards. I can't currently find the time to add a test, but when I do, I can give it a try. Any guide we should be following?

[gesinn-it-gea]

@D-Groenewegen ...take a look at the existing tests, maybe start with the JSONScript tests. There are also JSONScript tests in SMW itself. See also: https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/master/tests/phpunit/Integration/JSONScript/README.md

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Project coverage is 45.55%. Comparing base (e09a547) to head (bc9bc44).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
formats/incoming/SRF_Incoming.php	0.00%	9 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #870      +/-   ##
============================================
+ Coverage     45.52%   45.55%   +0.03%     
+ Complexity     2319     2318       -1     
============================================
  Files            80       80              
  Lines          9050     9044       -6     
============================================
  Hits           4120     4120              
+ Misses         4930     4924       -6     

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