ARROW-4403 : [Rust] Fix format errors
ARROW-4403 : [Rust] Fix format errors

Author: Pindikura Ravindra <ravindra@dremio.com>

Closes #3513 from pravindra/rust and squashes the following commits:

6b08acf2 <Pindikura Ravindra> ARROW-4403 :  Fix format errors

renesugar/arrow,majetideepak/arrow,majetideepak/arrow,kou/arrow,renesugar/arrow,kou/arrow,cpcloud/arrow,xhochy/arrow,renesugar/arrow,kou/arrow,majetideepak/arrow,pcmoritz/arrow,xhochy/arrow,xhochy/arrow,kou/arrow,tebeka/arrow,xhochy/arrow,pcmoritz/arrow,pcmoritz/arrow,icexelloss/arrow,xhochy/arrow,pcmoritz/arrow,renesugar/arrow,renesugar/arrow,wesm/arrow,majetideepak/arrow,majetideepak/arrow,apache/arrow,itaiin/arrow,cpcloud/arrow,laurentgo/arrow,cpcloud/arrow,laurentgo/arrow,icexelloss/arrow,laurentgo/arrow,wesm/arrow,pcmoritz/arrow,itaiin/arrow,cpcloud/arrow,renesugar/arrow,wesm/arrow,xhochy/arrow,tebeka/arrow,apache/arrow,itaiin/arrow,laurentgo/arrow,itaiin/arrow,majetideepak/arrow,wesm/arrow,icexelloss/arrow,wesm/arrow,majetideepak/arrow,kou/arrow,itaiin/arrow,itaiin/arrow,icexelloss/arrow,apache/arrow,pcmoritz/arrow,pcmoritz/arrow,apache/arrow,majetideepak/arrow,cpcloud/arrow,laurentgo/arrow,xhochy/arrow,icexelloss/arrow,renesugar/arrow,majetideepak/arrow,wesm/arrow,cpcloud/arrow,xhochy/arrow,apache/arrow,icexelloss/arrow,tebeka/arrow,laurentgo/arrow,icexelloss/arrow,pcmoritz/arrow,wesm/arrow,cpcloud/arrow,pcmoritz/arrow,tebeka/arrow,xhochy/arrow,cpcloud/arrow,renesugar/arrow,cpcloud/arrow,icexelloss/arrow,cpcloud/arrow,cpcloud/arrow,tebeka/arrow,icexelloss/arrow,itaiin/arrow,tebeka/arrow,laurentgo/arrow,icexelloss/arrow,apache/arrow,kou/arrow,xhochy/arrow,itaiin/arrow,cpcloud/arrow,apache/arrow,pcmoritz/arrow,itaiin/arrow,laurentgo/arrow,wesm/arrow,kou/arrow,icexelloss/arrow,kou/arrow,itaiin/arrow,majetideepak/arrow,tebeka/arrow,pcmoritz/arrow,kou/arrow,kou/arrow,laurentgo/arrow,xhochy/arrow,itaiin/arrow,xhochy/arrow,wesm/arrow,renesugar/arrow,renesugar/arrow,pcmoritz/arrow,majetideepak/arrow,xhochy/arrow,itaiin/arrow,renesugar/arrow,majetideepak/arrow,pcmoritz/arrow,kou/arrow,apache/arrow,cpcloud/arrow,majetideepak/arrow,apache/arrow,tebeka/arrow,renesugar/arrow,apache/arrow,laurentgo/arrow,pcmoritz/arrow,laurentgo/arrow,majetideepak/arrow,tebeka/arrow,cpcloud/arrow,kou/arrow,icexelloss/arrow,renesugar/arrow,wesm/arrow,pcmoritz/arrow,renesugar/arrow,laurentgo/arrow,apache/arrow,itaiin/arrow,apache/arrow,laurentgo/arrow,tebeka/arrow,majetideepak/arrow,apache/arrow,renesugar/arrow,kou/arrow,itaiin/arrow,kou/arrow,itaiin/arrow,xhochy/arrow,wesm/arrow,laurentgo/arrow,apache/arrow,wesm/arrow,icexelloss/arrow,xhochy/arrow,icexelloss/arrow,laurentgo/arrow,wesm/arrow,wesm/arrow