docs/contributing/coding-style: some improvements in the text
docs/contributing/coding-style: some improvements in the text

Also adding the package point of view.

4eek/tsuru,firebitsbr/tsuru,ggarnier/tsuru,gciotta/tsuru,hcxiong/tsuru,gwmoura/tsuru,jblancett/tsuru,RichardKnop/tsuru,gwmoura/tsuru,kgrvamsi/tsuru,cezarsa/tsuru,firebitsbr/tsuru,cezarsa/tsuru,tuxmonteiro/tsuru,ggarnier/tsuru,tuxmonteiro/tsuru,guilhermebr/tsuru,ArxdSilva/tsuru,cezarsa/tsuru,mderaldo/tsuru,hcxiong/tsuru,Endika/tsuru,kgrvamsi/tsuru,RichardKnop/tsuru,guilhermebr/tsuru,cgvarela/tsuru,ArxdSilva/tsuru,RichardKnop/tsuru,4eek/tsuru,cezarsa/tsuru,gwmoura/tsuru,gciotta/tsuru,tsuru/tsuru,gciotta/tsuru,kgrvamsi/tsuru,hcxiong/tsuru,jblancett/tsuru,firebitsbr/tsuru,ggarnier/tsuru,cgvarela/tsuru,mderaldo/tsuru,mderaldo/tsuru,cgvarela/tsuru,jblancett/tsuru,Endika/tsuru,guilhermebr/tsuru,ArxdSilva/tsuru,4eek/tsuru,tsuru/tsuru,tsuru/tsuru,Endika/tsuru,ggarnier/tsuru,tsuru/tsuru,guilhermebr/tsuru,ArxdSilva/tsuru,tuxmonteiro/tsuru