Bear.py: Change "arbitary" to "arbitrary"
Bear.py: Change "arbitary" to "arbitrary"

Fixes the typo contained in the setup_dependencies method on line 330.
I also checked to make sure there are no other instances of this typo
throughout the project. Adjusted text to make sure line length limits
are preserved, too.

Fixes https://github.com/coala-analyzer/coala/issues/2480

SanketDG/coala,yashtrivedi96/coala,coala-analyzer/coala,stevemontana1980/coala,JohnS-01/coala,refeed/coala,Asnelchristian/coala,coala/coala,sagark123/coala,SanketDG/coala,Shade5/coala,incorrectusername/coala,shreyans800755/coala,coala/coala,Balaji2198/coala,yashtrivedi96/coala,Asnelchristian/coala,MariosPanag/coala,sils1297/coala,impmihai/coala,nemaniarjun/coala,Balaji2198/coala,Asnelchristian/coala,MariosPanag/coala,sagark123/coala,arush0311/coala,RJ722/coala,aptrishu/coala,impmihai/coala,karansingh1559/coala,netman92/coala,ayushin78/coala,arjunsinghy96/coala,NiklasMM/coala,nemaniarjun/coala,JohnS-01/coala,refeed/coala,stevemontana1980/coala,CruiseDevice/coala,meetmangukiya/coala,sagark123/coala,Nosferatul/coala,Asalle/coala,impmihai/coala,shreyans800755/coala,incorrectusername/coala,Shade5/coala,shreyans800755/coala,Nosferatul/coala,sils1297/coala,arush0311/coala,jayvdb/coala,yashLadha/coala,coala/coala,sils1297/coala,karansingh1559/coala,CruiseDevice/coala,nemaniarjun/coala,arjunsinghy96/coala,karansingh1559/coala,aptrishu/coala,meetmangukiya/coala,rimacone/testing2,yashLadha/coala,RJ722/coala,coala-analyzer/coala,damngamerz/coala,aptrishu/coala,refeed/coala,Asalle/coala,Nosferatul/coala,Balaji2198/coala,ayushin78/coala,kartikeys98/coala,netman92/coala,Shade5/coala,yashLadha/coala,jayvdb/coala,damngamerz/coala,Asalle/coala,JohnS-01/coala,CruiseDevice/coala,rimacone/testing2,damngamerz/coala,meetmangukiya/coala,ayushin78/coala,stevemontana1980/coala,kartikeys98/coala,incorrectusername/coala,kartikeys98/coala,RJ722/coala,SanketDG/coala,yashtrivedi96/coala,arjunsinghy96/coala,jayvdb/coala,rimacone/testing2,NiklasMM/coala,arush0311/coala,coala-analyzer/coala,netman92/coala,NiklasMM/coala,MariosPanag/coala