Collectors.py: Add return annotation to function
Collectors.py: Add return annotation to function

This adds a return annotation to collect_all_bears_from_sections()
function in Collectors.py

Fixes https://github.com/coala-analyzer/coala/issues/1495

yashtrivedi96/coala,incorrectusername/coala,coala/coala,dagdaggo/coala,rimacone/testing2,AbdealiJK/coala,yland/coala,tltuan/coala,scottbelden/coala,svsn2117/coala,JohnS-01/coala,Balaji2198/coala,ManjiriBirajdar/coala,abhiroyg/coala,sudheesh001/coala,incorrectusername/coala,NalinG/coala,impmihai/coala,netman92/coala,djkonro/coala,SanketDG/coala,ayushin78/coala,karansingh1559/coala,aptrishu/coala,stevemontana1980/coala,ayushin78/coala,SanketDG/coala,swatilodha/coala,mr-karan/coala,lonewolf07/coala,lonewolf07/coala,nemaniarjun/coala,abhiroyg/coala,saurabhiiit/coala,d6e/coala,arush0311/coala,tltuan/coala,NalinG/coala,NalinG/coala,djkonro/coala,Shade5/coala,JohnS-01/coala,Balaji2198/coala,AdeshAtole/coala,rresol/coala,Nosferatul/coala,Nosferatul/coala,arush0311/coala,JohnS-01/coala,RJ722/coala,arafsheikh/coala,sagark123/coala,coala/coala,impmihai/coala,meetmangukiya/coala,svsn2117/coala,yashtrivedi96/coala,AbdealiJK/coala,sagark123/coala,meetmangukiya/coala,aptrishu/coala,karansingh1559/coala,MattAllmendinger/coala,rimacone/testing2,impmihai/coala,NalinG/coala,kartikeys98/coala,Balaji2198/coala,refeed/coala,yashtrivedi96/coala,coala-analyzer/coala,lonewolf07/coala,kartikeys98/coala,sils1297/coala,MariosPanag/coala,NalinG/coala,shreyans800755/coala,kartikeys98/coala,yashLadha/coala,svsn2117/coala,arush0311/coala,scottbelden/coala,damngamerz/coala,nemaniarjun/coala,yashLadha/coala,NiklasMM/coala,AdeshAtole/coala,jayvdb/coala,rresol/coala,stevemontana1980/coala,yland/coala,ayushin78/coala,swatilodha/coala,arjunsinghy96/coala,sagark123/coala,yashLadha/coala,mr-karan/coala,Asalle/coala,sudheesh001/coala,sophiavanvalkenburg/coala,Uran198/coala,abhiroyg/coala,Asalle/coala,SanketDG/coala,tltuan/coala,jayvdb/coala,arafsheikh/coala,coala-analyzer/coala,scottbelden/coala,aptrishu/coala,CruiseDevice/coala,sils1297/coala,tushar-rishav/coala,d6e/coala,Uran198/coala,dagdaggo/coala,vinc456/coala,jayvdb/coala,RJ722/coala,AbdealiJK/coala,damngamerz/coala,Asnelchristian/coala,arjunsinghy96/coala,saurabhiiit/coala,refeed/coala,refeed/coala,CruiseDevice/coala,NalinG/coala,karansingh1559/coala,MattAllmendinger/coala,d6e/coala,netman92/coala,meetmangukiya/coala,vinc456/coala,MariosPanag/coala,Asalle/coala,saurabhiiit/coala,Shade5/coala,arjunsinghy96/coala,tushar-rishav/coala,Asnelchristian/coala,sophiavanvalkenburg/coala,dagdaggo/coala,Nosferatul/coala,netman92/coala,sils1297/coala,NalinG/coala,coala/coala,rimacone/testing2,shreyans800755/coala,CruiseDevice/coala,shreyans800755/coala,djkonro/coala,NiklasMM/coala,Shade5/coala,coala-analyzer/coala,rresol/coala,sudheesh001/coala,vinc456/coala,Asnelchristian/coala,Uran198/coala,RJ722/coala,nemaniarjun/coala,mr-karan/coala,NiklasMM/coala,yland/coala,MattAllmendinger/coala,stevemontana1980/coala,ManjiriBirajdar/coala,ManjiriBirajdar/coala,incorrectusername/coala,swatilodha/coala,damngamerz/coala,tushar-rishav/coala,sophiavanvalkenburg/coala,MariosPanag/coala,arafsheikh/coala,AdeshAtole/coala