.ci: Modify shell scripts to two space indents

Give coala's shell scripts a standard.
Modify .sh files using `shfmt -i 2 -ci`
from https://github.com/mvdan/sh#shfmt.
This changes shell scripts according to
Google's guide.

Closes #2320

.ci/check_maintainership.sh

@@ -8,6 +8,6 @@ source ../rultor_secrets.sh
 
 # Make sure the user is a maintainer
 if curl "https://api.github.com/teams/1238757/memberships/${author}?access_token=${GITHUB_TOKEN}" | grep -q "Not Found"; then
-    echo "@${author} is not in the maintainers group."
-    exit 1
+  echo "@${author} is not in the maintainers group."
+  exit 1
 fi

.ci/deps.apt.sh

@@ -19,7 +19,7 @@ case $CIRCLE_BUILD_IMAGE in
     # Use xenial, needed to replace outdated julia provided by Circle CI
     ADD_APT_UBUNTU_RELEASE=xenial
     # Work around lack of systemd on trusty, which xenial's lxc-common expects
-    echo '#!/bin/sh' | sudo tee /usr/bin/systemd-detect-virt > /dev/null
+    echo '#!/bin/sh' | sudo tee /usr/bin/systemd-detect-virt >/dev/null
     sudo chmod a+x /usr/bin/systemd-detect-virt
 
     # The non-apt go provided by Circle CI is acceptable
@@ -41,7 +41,7 @@ case $CIRCLE_BUILD_IMAGE in
 esac
 
 if [ -n "$ADD_APT_UBUNTU_RELEASE" ]; then
-  echo "deb http://archive.ubuntu.com/ubuntu/ $ADD_APT_UBUNTU_RELEASE main universe" | sudo tee -a /etc/apt/sources.list.d/$ADD_APT_UBUNTU_RELEASE.list > /dev/null
+  echo "deb http://archive.ubuntu.com/ubuntu/ $ADD_APT_UBUNTU_RELEASE main universe" | sudo tee -a /etc/apt/sources.list.d/$ADD_APT_UBUNTU_RELEASE.list >/dev/null
 fi
 
 if [ "$USE_PPAS" = "true" ]; then

.ci/deps.coala-bears.sh

@@ -4,7 +4,7 @@ set -x
 set -e
 
 # making coala cache the dependencies downloaded upon first run
-echo '' > /tmp/dummy
+echo '' >/tmp/dummy
 
 coala --ci -V --bears CheckstyleBear,ScalaLintBear --files /tmp/dummy --no-config --bear-dirs bears
 

.ci/deps.pip.sh

@@ -5,13 +5,13 @@ TERM=dumb
 
 # Choose the python versions to install deps for
 case $CIRCLE_NODE_INDEX in
- 0) dep_versions=( "3.4.3" "3.5.1" ) ;;
- 1) dep_versions=( "3.4.3" ) ;;
- -1) dep_versions=( ) ;;  # set by .travis.yml
- *) dep_versions=( "3.5.1" ) ;;
+ 0) dep_versions=("3.4.3" "3.5.1") ;;
+ 1) dep_versions=("3.4.3") ;;
+ -1) dep_versions=() ;; # set by .travis.yml
+ *) dep_versions=("3.5.1") ;;
 esac
 
-for dep_version in "${dep_versions[@]}" ; do
+for dep_version in "${dep_versions[@]}"; do
   pyenv install -ks $dep_version
   pyenv local $dep_version 2.7.10
   python --version

.ci/deps.r.sh

@@ -2,7 +2,7 @@ set -e
 set -x
 
 # R commands
-echo '.libPaths( c( "'"$R_LIB_USER"'", .libPaths()) )' >> .Rprofile
-echo 'options(repos=structure(c(CRAN="http://cran.rstudio.com")))' >> .Rprofile
+echo '.libPaths( c( "'"$R_LIB_USER"'", .libPaths()) )' >>.Rprofile
+echo 'options(repos=structure(c(CRAN="http://cran.rstudio.com")))' >>.Rprofile
 R -q -e 'install.packages("lintr")'
 R -q -e 'install.packages("formatR")'

.ci/deps.sh

@@ -25,7 +25,7 @@ go get -u github.com/BurntSushi/toml/cmd/tomlv
 bundle install --path=vendor/bundle --binstubs=vendor/bin --jobs=8 --retry=3
 
 # Dart Lint commands
-if ! dartanalyzer -v &> /dev/null ; then
+if ! dartanalyzer -v &>/dev/null; then
   wget -nc -O ~/dart-sdk.zip https://storage.googleapis.com/dart-archive/channels/stable/release/1.14.2/sdk/dartsdk-linux-x64-release.zip
   unzip -n ~/dart-sdk.zip -d ~/
 fi

.ci/env_variables.sh

@@ -1,9 +1,9 @@
-export python_virtualenv=`pyenv prefix`
-export python_implementation=`python -c "import platform; print(platform.python_implementation())"`
-export python_version=`python -c "import sys; print(str(sys.version_info.major)+'.'+str(sys.version_info.minor))"`
+export python_virtualenv=$(pyenv prefix)
+export python_implementation=$(python -c "import platform; print(platform.python_implementation())")
+export python_version=$(python -c "import sys; print(str(sys.version_info.major)+'.'+str(sys.version_info.minor))")
 
-if [ "$(uname)" == "Darwin" ] ; then
+if [ "$(uname)" == "Darwin" ]; then
   export system_os="OSX"
-elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ] ; then
+elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
   export system_os="LINUX"
 fi

.ci/tests.sh

@@ -5,7 +5,7 @@ source .ci/env_variables.sh
 
 args=()
 
-if [ "$system_os" == "LINUX" ] ; then
+if [ "$system_os" == "LINUX" ]; then
   args+=('--cov' '--cov-fail-under=100' '--doctest-modules')
 fi