Strip trailing spaces

README.md

@@ -328,7 +328,7 @@ maintenance and allows for more easy customization.
 
  - **Stage 5** - The Raspbian Full image. More development
    tools, an email client, learning tools like Scratch, specialized packages
-   like sonic-pi, office productivity, etc.  
+   like sonic-pi, office productivity, etc.
 
 ### Stage specification
 
@@ -380,8 +380,8 @@ Example:
 
 ```bash
 root@build-machine:~/$ lsblk | grep nbd
-nbd1      43:32   0    10G  0 disk 
-├─nbd1p1  43:33   0    10G  0 part 
+nbd1      43:32   0    10G  0 disk
+├─nbd1p1  43:33   0    10G  0 part
 └─nbd1p1 253:0    0    10G  0 part
 
 root@build-machine:~/$ ps xa | grep qemu-nbd
@@ -405,7 +405,7 @@ It can happen, that your build stops in case of an error. Normally `./build.sh`
 A typical message indicating that there are some orphaned device mapper entries is this:
 
 ```
-Failed to set NBD socket 
+Failed to set NBD socket
 Disconnect client, due to: Unexpected end-of-file before all bytes were read
 ```
 
@@ -428,10 +428,10 @@ If that happens go through the following steps:
    or
    sudo ./imagetool.sh --cleanup
    ```
-   
+
    Note: The `imagetool.sh` command will cleanup any /dev/nbdX that is not connected to a running `qemu-nbd` daemon. Be careful if you use network block devices for other tasks utilizing NBDs on your build machine as well.
 
-Now you should be able to start a new build without running into troubles again. Most of the time, especially when using Docker build, you will only need no. 3 to get everything up and running again. 
+Now you should be able to start a new build without running into troubles again. Most of the time, especially when using Docker build, you will only need no. 3 to get everything up and running again.
 
 # Troubleshooting
 

build-docker.sh

@@ -48,7 +48,7 @@ fi
 CONTAINER_NAME=${CONTAINER_NAME:-pigen_work}
 CONTINUE=${CONTINUE:-0}
 PRESERVE_CONTAINER=${PRESERVE_CONTAINER:-0}
-PIGEN_DOCKER_OPTS=${PIGEN_DOCKER_OPTS:-""}  
+PIGEN_DOCKER_OPTS=${PIGEN_DOCKER_OPTS:-""}
 
 if [ -z "${IMG_NAME}" ]; then
 	echo "IMG_NAME not set in 'config'" 1>&2

build.sh

@@ -133,7 +133,7 @@ run_stage(){
 		done
 	fi
 
-	if [ "${USE_QCOW2}" = "1" ]; then 
+	if [ "${USE_QCOW2}" = "1" ]; then
 		unload_qimage
 	else
 		# make sure we are not umounting during export-image stage
@@ -369,7 +369,7 @@ for EXPORT_DIR in ${EXPORT_DIRS}; do
 
 	else
 		run_stage
-	fi 
+	fi
 	if [ "${USE_QEMU}" != "1" ]; then
 		if [ -e "${EXPORT_DIR}/EXPORT_NOOBS" ]; then
 			# shellcheck source=/dev/null