Invoke "/usr/bin/env bash" instead of "/bin/bash".
Invoke "/usr/bin/env bash" instead of "/bin/bash".

Prior to this commit:

```
$ git grep '#!/usr/bin/env bash' | wc -l
8
$ git grep '#!/bin/bash' | wc -l
1
```

After to this commit:

```
$ git grep '#!/usr/bin/env bash' | wc -l
9
$ git grep '#!/bin/bash' | wc -l
0
```

parkera/swift,JGiola/swift,kstaring/swift,amraboelela/swift,airspeedswift/swift,CodaFi/swift,JGiola/swift,dduan/swift,natecook1000/swift,JaSpa/swift,airspeedswift/swift,JGiola/swift,CodaFi/swift,tardieu/swift,gottesmm/swift,kperryua/swift,danielmartin/swift,jopamer/swift,lorentey/swift,tkremenek/swift,KrishMunot/swift,SwiftAndroid/swift,milseman/swift,practicalswift/swift,felix91gr/swift,austinzheng/swift,jckarter/swift,benlangmuir/swift,ahoppen/swift,shahmishal/swift,zisko/swift,johnno1962d/swift,jopamer/swift,brentdax/swift,stephentyrone/swift,kstaring/swift,hooman/swift,djwbrown/swift,danielmartin/swift,bitjammer/swift,calebd/swift,adrfer/swift,hooman/swift,austinzheng/swift,danielmartin/swift,CodaFi/swift,austinzheng/swift,johnno1962d/swift,codestergit/swift,shajrawi/swift,OscarSwanros/swift,ahoppen/swift,milseman/swift,KrishMunot/swift,zisko/swift,jckarter/swift,jmgc/swift,frootloops/swift,Jnosh/swift,gmilos/swift,manavgabhawala/swift,kstaring/swift,JaSpa/swift,uasys/swift,hooman/swift,brentdax/swift,rudkx/swift,adrfer/swift,shahmishal/swift,frootloops/swift,karwa/swift,practicalswift/swift,johnno1962d/swift,gmilos/swift,xedin/swift,glessard/swift,bitjammer/swift,modocache/swift,rudkx/swift,brentdax/swift,johnno1962d/swift,benlangmuir/swift,nathawes/swift,rudkx/swift,JGiola/swift,ken0nek/swift,milseman/swift,Jnosh/swift,modocache/swift,return/swift,natecook1000/swift,JaSpa/swift,roambotics/swift,shahmishal/swift,brentdax/swift,adrfer/swift,lorentey/swift,ben-ng/swift,austinzheng/swift,manavgabhawala/swift,natecook1000/swift,xwu/swift,devincoughlin/swift,nathawes/swift,calebd/swift,djwbrown/swift,dduan/swift,devincoughlin/swift,kperryua/swift,roambotics/swift,tardieu/swift,return/swift,devincoughlin/swift,dreamsxin/swift,IngmarStein/swift,slavapestov/swift,ben-ng/swift,parkera/swift,SwiftAndroid/swift,uasys/swift,xedin/swift,IngmarStein/swift,apple/swift,amraboelela/swift,gribozavr/swift,OscarSwanros/swift,alblue/swift,jckarter/swift,ahoppen/swift,SwiftAndroid/swift,slavapestov/swift,karwa/swift,arvedviehweger/swift,tjw/swift,frootloops/swift,roambotics/swift,Jnosh/swift,tinysun212/swift-windows,harlanhaskins/swift,glessard/swift,jtbandes/swift,calebd/swift,harlanhaskins/swift,jtbandes/swift,gottesmm/swift,xedin/swift,deyton/swift,tinysun212/swift-windows,felix91gr/swift,JaSpa/swift,benlangmuir/swift,johnno1962d/swift,stephentyrone/swift,shahmishal/swift,ben-ng/swift,airspeedswift/swift,brentdax/swift,tkremenek/swift,lorentey/swift,adrfer/swift,rudkx/swift,gregomni/swift,huonw/swift,tinysun212/swift-windows,gmilos/swift,calebd/swift,shajrawi/swift,SwiftAndroid/swift,hooman/swift,ben-ng/swift,ken0nek/swift,allevato/swift,stephentyrone/swift,allevato/swift,adrfer/swift,uasys/swift,alblue/swift,therealbnut/swift,huonw/swift,practicalswift/swift,nathawes/swift,tkremenek/swift,deyton/swift,return/swift,aschwaighofer/swift,jmgc/swift,brentdax/swift,kperryua/swift,xedin/swift,sschiau/swift,kperryua/swift,manavgabhawala/swift,allevato/swift,nathawes/swift,rudkx/swift,swiftix/swift,glessard/swift,jckarter/swift,amraboelela/swift,deyton/swift,JGiola/swift,KrishMunot/swift,practicalswift/swift,dduan/swift,apple/swift,natecook1000/swift,djwbrown/swift,gribozavr/swift,hughbe/swift,austinzheng/swift,JaSpa/swift,parkera/swift,deyton/swift,jmgc/swift,tkremenek/swift,harlanhaskins/swift,OscarSwanros/swift,djwbrown/swift,glessard/swift,swiftix/swift,huonw/swift,roambotics/swift,hughbe/swift,jopamer/swift,benlangmuir/swift,JGiola/swift,djwbrown/swift,Jnosh/swift,gottesmm/swift,stephentyrone/swift,apple/swift,tjw/swift,xwu/swift,huonw/swift,jmgc/swift,manavgabhawala/swift,amraboelela/swift,parkera/swift,aschwaighofer/swift,huonw/swift,alblue/swift,ahoppen/swift,milseman/swift,OscarSwanros/swift,Jnosh/swift,arvedviehweger/swift,hughbe/swift,devincoughlin/swift,alblue/swift,bitjammer/swift,ken0nek/swift,airspeedswift/swift,kstaring/swift,gribozavr/swift,parkera/swift,therealbnut/swift,glessard/swift,gribozavr/swift,return/swift,natecook1000/swift,glessard/swift,tardieu/swift,arvedviehweger/swift,gmilos/swift,djwbrown/swift,huonw/swift,ken0nek/swift,gottesmm/swift,aschwaighofer/swift,jopamer/swift,gregomni/swift,codestergit/swift,allevato/swift,parkera/swift,adrfer/swift,zisko/swift,calebd/swift,shahmishal/swift,gottesmm/swift,ahoppen/swift,frootloops/swift,tardieu/swift,manavgabhawala/swift,gregomni/swift,tardieu/swift,sschiau/swift,ben-ng/swift,apple/swift,tjw/swift,karwa/swift,karwa/swift,roambotics/swift,JaSpa/swift,tkremenek/swift,gottesmm/swift,allevato/swift,tardieu/swift,IngmarStein/swift,karwa/swift,kperryua/swift,KrishMunot/swift,atrick/swift,jckarter/swift,kstaring/swift,zisko/swift,codestergit/swift,gribozavr/swift,manavgabhawala/swift,uasys/swift,xwu/swift,karwa/swift,KrishMunot/swift,lorentey/swift,sschiau/swift,codestergit/swift,milseman/swift,CodaFi/swift,jckarter/swift,practicalswift/swift,therealbnut/swift,milseman/swift,uasys/swift,therealbnut/swift,jmgc/swift,shajrawi/swift,atrick/swift,parkera/swift,gregomni/swift,arvedviehweger/swift,shajrawi/swift,kperryua/swift,tinysun212/swift-windows,dduan/swift,KrishMunot/swift,atrick/swift,nathawes/swift,alblue/swift,johnno1962d/swift,tjw/swift,bitjammer/swift,huonw/swift,rudkx/swift,swiftix/swift,dduan/swift,therealbnut/swift,KrishMunot/swift,gmilos/swift,IngmarStein/swift,jtbandes/swift,gregomni/swift,natecook1000/swift,gribozavr/swift,harlanhaskins/swift,jtbandes/swift,arvedviehweger/swift,devincoughlin/swift,felix91gr/swift,SwiftAndroid/swift,djwbrown/swift,swiftix/swift,CodaFi/swift,tjw/swift,benlangmuir/swift,johnno1962d/swift,jtbandes/swift,nathawes/swift,stephentyrone/swift,lorentey/swift,sschiau/swift,gregomni/swift,calebd/swift,arvedviehweger/swift,gribozavr/swift,sschiau/swift,milseman/swift,danielmartin/swift,practicalswift/swift,karwa/swift,practicalswift/swift,devincoughlin/swift,CodaFi/swift,therealbnut/swift,airspeedswift/swift,slavapestov/swift,therealbnut/swift,harlanhaskins/swift,atrick/swift,tjw/swift,benlangmuir/swift,ken0nek/swift,kstaring/swift,danielmartin/swift,austinzheng/swift,zisko/swift,frootloops/swift,tkremenek/swift,russbishop/swift,modocache/swift,hughbe/swift,xedin/swift,gottesmm/swift,danielmartin/swift,natecook1000/swift,airspeedswift/swift,slavapestov/swift,xedin/swift,deyton/swift,ben-ng/swift,sschiau/swift,xwu/swift,tardieu/swift,codestergit/swift,slavapestov/swift,xwu/swift,tkremenek/swift,IngmarStein/swift,russbishop/swift,frootloops/swift,modocache/swift,deyton/swift,jopamer/swift,ken0nek/swift,swiftix/swift,lorentey/swift,deyton/swift,modocache/swift,zisko/swift,sschiau/swift,felix91gr/swift,xwu/swift,harlanhaskins/swift,shajrawi/swift,dduan/swift,amraboelela/swift,alblue/swift,parkera/swift,atrick/swift,karwa/swift,russbishop/swift,felix91gr/swift,codestergit/swift,zisko/swift,manavgabhawala/swift,hooman/swift,OscarSwanros/swift,felix91gr/swift,allevato/swift,IngmarStein/swift,return/swift,SwiftAndroid/swift,austinzheng/swift,swiftix/swift,return/swift,jtbandes/swift,amraboelela/swift,devincoughlin/swift,return/swift,aschwaighofer/swift,roambotics/swift,jtbandes/swift,apple/swift,uasys/swift,aschwaighofer/swift,tinysun212/swift-windows,bitjammer/swift,allevato/swift,stephentyrone/swift,IngmarStein/swift,practicalswift/swift,tjw/swift,slavapestov/swift,OscarSwanros/swift,Jnosh/swift,harlanhaskins/swift,kstaring/swift,aschwaighofer/swift,hooman/swift,OscarSwanros/swift,dduan/swift,arvedviehweger/swift,modocache/swift,russbishop/swift,modocache/swift,frootloops/swift,uasys/swift,gribozavr/swift,apple/swift,jopamer/swift,tinysun212/swift-windows,stephentyrone/swift,codestergit/swift,lorentey/swift,lorentey/swift,brentdax/swift,dreamsxin/swift,bitjammer/swift,shajrawi/swift,adrfer/swift,kperryua/swift,ahoppen/swift,airspeedswift/swift,ben-ng/swift,danielmartin/swift,shajrawi/swift,devincoughlin/swift,calebd/swift,bitjammer/swift,hughbe/swift,hooman/swift,amraboelela/swift,jckarter/swift,nathawes/swift,xwu/swift,xedin/swift,felix91gr/swift,russbishop/swift,russbishop/swift,CodaFi/swift,gmilos/swift,jmgc/swift,gmilos/swift,russbishop/swift,slavapestov/swift,sschiau/swift,alblue/swift,atrick/swift,hughbe/swift,shahmishal/swift,Jnosh/swift,ken0nek/swift,shahmishal/swift,hughbe/swift,shahmishal/swift,xedin/swift,SwiftAndroid/swift,shajrawi/swift,jmgc/swift,JaSpa/swift,aschwaighofer/swift,jopamer/swift,tinysun212/swift-windows,swiftix/swift