Add unit test for string fun in leex test suite
Add unit test for string fun in leex test suite

neeraj9/otp,Teino1978-Corp/erlang-otp,massemanet/otp,g-andrade/otp,klarna/otp,NOMORECOFFEE/otp,dumbbell/otp,g-andrade/otp,ferd/otp,cnbin/otp,lianghaivv/otp,dgud/otp,erlang/otp,sdebnath/otp,massemanet/otp,paladim/otp,rlipscombe/otp,fenollp/otp,psyeugenic/otp,massemanet/otp,electricimp/otp,paladim/otp,Teino1978-Corp/erlang-otp,emile/otp,jemsbhai/otp,getong/otp,weisslj/otp,goertzenator/otp,weisslj/otp,johanclaesson/otp,lightcyphers/otp,riverrun/otp,lemenkov/otp,sammoth-wazoku/otp,dumbbell/otp,cnbin/otp,c-rack/otp,paulcager/otp,basho/otp,fenollp/otp,RaimoNiskanen/otp,NOMORECOFFEE/otp,dgud/otp,hairyhum/otp,mikpe/otp,weisslj/otp,RGafiyatullin/otp,emacsmirror/erlang,basho/otp,bjorng/otp,bjorng/otp,ferd/otp,bernardd/otp,vladdu/otp,rlipscombe/otp,paladim/otp,RaimoNiskanen/otp,lightcyphers/otp,RaimoNiskanen/otp,benoitc/otp-1,vinoski/otp,haguenau/otp,theom/otp,matwey/otp,klarna/otp,RJ/otp,potatosalad/otp,VincentHHL/otp,lhslll/otp,jamesruan/otp,RGafiyatullin/otp,massemanet/otp,stolen/otp,lianghaivv/otp,derek121/otp,hairyhum/otp,jj1bdx/otp,RoadRunnr/otp,derek121/otp,psyeugenic/otp,vladdu/otp,riverrun/otp,emacsmirror/erlang,tuncer/otp,matwey/otp,VincentHHL/otp,jemsbhai/otp,tuncer/otp,kvakvs/otp,basho/otp,vic/otp,entropiae/otp,isvilen/otp,saleyn/otp,psyeugenic/otp,RichMorin/otp,ahmedshafeeq/otp,schlagert/otp,hairyhum/otp,lianghaivv/otp,paulcager/otp,marquisthunder/otp,GinjaNinja32/otp,krishnakumar4a4/otp,potatosalad/otp,kvakvs/otp,uabboli/otp,sdebnath/otp,legoscia/otp,fenollp/otp,RaimoNiskanen/otp,RGafiyatullin/otp,vic/otp,schlagert/otp,fenollp/otp,aboroska/otp,lucafavatella/otp,uabboli/otp,bugs-erlang-org/otp,platinumthinker/otp,vic/otp,vladdu/otp,falkevik/otp,derek121/otp,dgud/otp,emacsmirror/erlang,paladim/otp,bsmr-erlang/otp,basho/otp,erlang/otp,NOMORECOFFEE/otp,msantos/otp,massemanet/otp,RoadRunnr/otp,enikki/otp,awetzel/otp,VincentHHL/otp,weisslj/otp,theom/otp,RGafiyatullin/otp,erlang/otp,ahmedshafeeq/otp,mujiatong/otp,rlipscombe/otp,sammoth-wazoku/otp,mikpe/otp,jj1bdx/otp,vladdu/otp,ahmedshafeeq/otp,dumbbell/otp,platinumthinker/otp,theom/otp,lrascao/otp,sammoth-wazoku/otp,haguenau/otp,entropiae/otp,mikpe/otp,legoscia/otp,dgud/otp,bernardd/otp,schlagert/otp,release-project/otp,aboroska/otp,electricimp/otp,vladdu/otp,dgud/otp,NOMORECOFFEE/otp,schlagert/otp,jj1bdx/otp,paulcager/otp,emile/otp,RJ/otp,Teino1978-Corp/otp,jamesruan/otp,legoscia/otp,awetzel/otp,Teino1978-Corp/otp,getong/otp,bjorng/otp,jj1bdx/otp,RGafiyatullin/otp,johanclaesson/otp,enikki/otp,RJ/otp,c-rack/otp,c-rack/otp,sdebnath/otp,msantos/otp,erlang/otp,haguenau/otp,sitexa/otp,ferd/otp,weisslj/otp,falkevik/otp,release-project/otp,paulcager/otp,matwey/otp,saleyn/otp,potatosalad/otp,dumbbell/otp,enikki/otp,NOMORECOFFEE/otp,saleyn/otp,c-rack/otp,erlang/otp,lemenkov/otp,cobusc/otp,ferd/otp,fenollp/otp,beni55/otp,RJ/otp,ferd/otp,VincentHHL/otp,lianghaivv/otp,yangchengjian/otp,platinumthinker/otp,dumbbell/otp,lantti/otp,kvakvs/otp,mujiatong/otp,ahmedshafeeq/otp,NOMORECOFFEE/otp,beni55/otp,electricimp/otp,weisslj/otp,release-project/otp,vladdu/otp,beni55/otp,electricimp/otp,awetzel/otp,aboroska/otp,g-andrade/otp,Teino1978-Corp/erlang-otp,neeraj9/otp,emile/otp,lantti/otp,electricimp/otp,release-project/otp,emile/otp,lantti/otp,cobusc/otp,yangchengjian/otp,sammoth-wazoku/otp,ferd/otp,bsmr-erlang/otp,paulcager/otp,falkevik/otp,lantti/otp,falkevik/otp,klarna/otp,neeraj9/otp,bugs-erlang-org/otp,lrascao/otp,lrascao/otp,goertzenator/otp,potatosalad/otp,fenollp/otp,benoitc/otp-1,palas/otp,vic/otp,bsmr-erlang/otp,sammoth-wazoku/otp,uabboli/otp,rlipscombe/otp,lantti/otp,potatosalad/otp,marquisthunder/otp,bjorng/otp,vinoski/otp,dgud/otp,psyeugenic/otp,rlipscombe/otp,RichMorin/otp,lrascao/otp,goertzenator/otp,Teino1978-Corp/erlang-otp,yangchengjian/otp,benoitc/otp-1,lrascao/otp,johanclaesson/otp,matwey/otp,dumbbell/otp,ader1990/otp,g-andrade/otp,Teino1978-Corp/erlang-otp,beni55/otp,lantti/otp,legoscia/otp,isvilen/otp,jinshana/otp,sammoth-wazoku/otp,lhslll/otp,basho/otp,emacsmirror/erlang,awetzel/otp,neeraj9/otp,lrascao/otp,hairyhum/otp,vinoski/otp,jamesruan/otp,ader1990/otp,electricimp/otp,awetzel/otp,palas/otp,johanclaesson/otp,jinshana/otp,GinjaNinja32/otp,entropiae/otp,getong/otp,basho/otp,cnbin/otp,falkevik/otp,krishnakumar4a4/otp,paulcager/otp,release-project/otp,GinjaNinja32/otp,sitexa/otp,schlagert/otp,schlagert/otp,kvakvs/otp,uabboli/otp,lrascao/otp,RaimoNiskanen/otp,hairyhum/otp,isvilen/otp,vladdu/otp,RoadRunnr/otp,matwey/otp,hairyhum/otp,lantti/otp,VincentHHL/otp,awetzel/otp,c-rack/otp,jemsbhai/otp,potatosalad/otp,mikpe/otp,enikki/otp,vic/otp,platinumthinker/otp,weisslj/otp,g-andrade/otp,gjaldon/otp,goertzenator/otp,vic/otp,potatosalad/otp,isvilen/otp,beni55/otp,bernardd/otp,lhslll/otp,mikpe/otp,RaimoNiskanen/otp,goertzenator/otp,sitexa/otp,beni55/otp,palas/otp,sitexa/otp,krishnakumar4a4/otp,g-andrade/otp,getong/otp,neeraj9/otp,derek121/otp,ahmedshafeeq/otp,VincentHHL/otp,lianghaivv/otp,lucafavatella/otp,cnbin/otp,dgud/otp,platinumthinker/otp,vic/otp,RJ/otp,lightcyphers/otp,c-rack/otp,sitexa/otp,fenollp/otp,weisslj/otp,legoscia/otp,riverrun/otp,emile/otp,GinjaNinja32/otp,potatosalad/otp,enikki/otp,marquisthunder/otp,bjorng/otp,jj1bdx/otp,psyeugenic/otp,dumbbell/otp,neeraj9/otp,lightcyphers/otp,msantos/otp,Teino1978-Corp/otp,cobusc/otp,GinjaNinja32/otp,release-project/otp,GinjaNinja32/otp,jj1bdx/otp,aboroska/otp,bernardd/otp,erlang/otp,erlang/otp,NOMORECOFFEE/otp,uabboli/otp,ferd/otp,riverrun/otp,klarna/otp,riverrun/otp,krishnakumar4a4/otp,krishnakumar4a4/otp,Teino1978-Corp/erlang-otp,massemanet/otp,sitexa/otp,lemenkov/otp,jemsbhai/otp,dgud/otp,neeraj9/otp,cobusc/otp,gjaldon/otp,lrascao/otp,jemsbhai/otp,psyeugenic/otp,jemsbhai/otp,rlipscombe/otp,basho/otp,emacsmirror/erlang,klarna/otp,bugs-erlang-org/otp,mikpe/otp,lianghaivv/otp,jinshana/otp,vladdu/otp,bugs-erlang-org/otp,aboroska/otp,RoadRunnr/otp,saleyn/otp,lucafavatella/otp,saleyn/otp,kvakvs/otp,emile/otp,ader1990/otp,uabboli/otp,isvilen/otp,lemenkov/otp,lhslll/otp,basho/otp,RaimoNiskanen/otp,legoscia/otp,lhslll/otp,mikpe/otp,klarna/otp,massemanet/otp,stolen/otp,cobusc/otp,paulcager/otp,tuncer/otp,mujiatong/otp,isvilen/otp,psyeugenic/otp,vinoski/otp,riverrun/otp,gjaldon/otp,emacsmirror/erlang,ader1990/otp,klarna/otp,electricimp/otp,johanclaesson/otp,uabboli/otp,isvilen/otp,lemenkov/otp,ahmedshafeeq/otp,legoscia/otp,paladim/otp,lianghaivv/otp,uabboli/otp,yangchengjian/otp,ader1990/otp,goertzenator/otp,erlang/otp,lightcyphers/otp,haguenau/otp,yangchengjian/otp,jinshana/otp,jinshana/otp,theom/otp,derek121/otp,mikpe/otp,sdebnath/otp,mikpe/otp,neeraj9/otp,tuncer/otp,RJ/otp,sitexa/otp,RichMorin/otp,haguenau/otp,msantos/otp,rlipscombe/otp,RoadRunnr/otp,Teino1978-Corp/otp,benoitc/otp-1,isvilen/otp,release-project/otp,paladim/otp,haguenau/otp,hairyhum/otp,NOMORECOFFEE/otp,jemsbhai/otp,RichMorin/otp,bsmr-erlang/otp,bjorng/otp,kvakvs/otp,marquisthunder/otp,jamesruan/otp,sdebnath/otp,theom/otp,dgud/otp,bsmr-erlang/otp,RoadRunnr/otp,lightcyphers/otp,weisslj/otp,GinjaNinja32/otp,vinoski/otp,palas/otp,RoadRunnr/otp,riverrun/otp,emacsmirror/erlang,marquisthunder/otp,rlipscombe/otp,johanclaesson/otp,falkevik/otp,msantos/otp,RGafiyatullin/otp,Teino1978-Corp/erlang-otp,enikki/otp,beni55/otp,paulcager/otp,emacsmirror/erlang,theom/otp,massemanet/otp,sdebnath/otp,lucafavatella/otp,bsmr-erlang/otp,RaimoNiskanen/otp,mujiatong/otp,stolen/otp,vic/otp,kvakvs/otp,Teino1978-Corp/otp,getong/otp,ader1990/otp,sdebnath/otp,gjaldon/otp,lhslll/otp,RoadRunnr/otp,aboroska/otp,derek121/otp,legoscia/otp,c-rack/otp,g-andrade/otp,aboroska/otp,bernardd/otp,cnbin/otp,benoitc/otp-1,RJ/otp,bjorng/otp,release-project/otp,RichMorin/otp,RichMorin/otp,paladim/otp,lightcyphers/otp,bjorng/otp,entropiae/otp,cobusc/otp,rlipscombe/otp,Teino1978-Corp/otp,jamesruan/otp,klarna/otp,isvilen/otp,bsmr-erlang/otp,haguenau/otp,bernardd/otp,sammoth-wazoku/otp,msantos/otp,sdebnath/otp,vinoski/otp,entropiae/otp,jemsbhai/otp,platinumthinker/otp,tuncer/otp,aboroska/otp,stolen/otp,lucafavatella/otp,falkevik/otp,RGafiyatullin/otp,fenollp/otp,basho/otp,lucafavatella/otp,RoadRunnr/otp,palas/otp,riverrun/otp,saleyn/otp,bsmr-erlang/otp,dumbbell/otp,entropiae/otp,erlang/otp,palas/otp,c-rack/otp,platinumthinker/otp,kvakvs/otp,potatosalad/otp,bsmr-erlang/otp,theom/otp,getong/otp,g-andrade/otp,lhslll/otp,palas/otp,gjaldon/otp,krishnakumar4a4/otp,ahmedshafeeq/otp,cnbin/otp,benoitc/otp-1,vinoski/otp,lemenkov/otp,jinshana/otp,goertzenator/otp,tuncer/otp,RGafiyatullin/otp,enikki/otp,GinjaNinja32/otp,cobusc/otp,msantos/otp,release-project/otp,stolen/otp,dgud/otp,g-andrade/otp,cobusc/otp,mujiatong/otp,jamesruan/otp,lhslll/otp,yangchengjian/otp,jinshana/otp,Teino1978-Corp/otp,ahmedshafeeq/otp,ader1990/otp,goertzenator/otp,jj1bdx/otp,gjaldon/otp,stolen/otp,sammoth-wazoku/otp,fenollp/otp,jamesruan/otp,RJ/otp,yangchengjian/otp,lemenkov/otp,enikki/otp,entropiae/otp,matwey/otp,electricimp/otp,Teino1978-Corp/otp,bjorng/otp,derek121/otp,RichMorin/otp,vinoski/otp,jj1bdx/otp,bernardd/otp,tuncer/otp,marquisthunder/otp,VincentHHL/otp,goertzenator/otp,bugs-erlang-org/otp,schlagert/otp,krishnakumar4a4/otp,emile/otp,lrascao/otp,emacsmirror/erlang,ader1990/otp,getong/otp,sitexa/otp,mikpe/otp,emile/otp,bugs-erlang-org/otp,yangchengjian/otp,saleyn/otp,gjaldon/otp,beni55/otp,ahmedshafeeq/otp,krishnakumar4a4/otp,bernardd/otp,gjaldon/otp,tuncer/otp,stolen/otp,ferd/otp,Teino1978-Corp/erlang-otp,getong/otp,matwey/otp,lucafavatella/otp,entropiae/otp,theom/otp,legoscia/otp,emacsmirror/erlang,tuncer/otp,psyeugenic/otp,jamesruan/otp,bernardd/otp,haguenau/otp,jj1bdx/otp,johanclaesson/otp,potatosalad/otp,vinoski/otp,falkevik/otp,bugs-erlang-org/otp,stolen/otp,jinshana/otp,lightcyphers/otp,msantos/otp,getong/otp,g-andrade/otp,lianghaivv/otp,johanclaesson/otp,isvilen/otp,bugs-erlang-org/otp,benoitc/otp-1,electricimp/otp,erlang/otp,lantti/otp,uabboli/otp,marquisthunder/otp,benoitc/otp-1,dumbbell/otp,awetzel/otp,ferd/otp,saleyn/otp,schlagert/otp,massemanet/otp,paladim/otp,matwey/otp,dumbbell/otp,bjorng/otp,VincentHHL/otp,vladdu/o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