tests: run mvdan/shfmt on test runs

While I do not agree with _every_ style change, this will force Dokku to have consistent formatting across all shell scripts, which is arguably a Good Thing™.

The command used to reprocess everything is:

```shell
shfmt -l -bn -ci -i 2 -w .
```

plugins/certs/subcommands/add

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
 source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
 source "$PLUGIN_AVAILABLE_PATH/certs/functions"
 
@@ -32,15 +33,17 @@ certs_set() {
   local cmd="$1"
   [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
   verify_app_name "$2"
-  local APP="$2"; local CRT_FILE="$3"; local KEY_FILE="$4"; local APP_SSL_PATH="$DOKKU_ROOT/$APP/tls"
-
+  local APP="$2"
+  local CRT_FILE="$3"
+  local KEY_FILE="$4"
+  local APP_SSL_PATH="$DOKKU_ROOT/$APP/tls"
 
   if is_file_import "$CRT_FILE" "$KEY_FILE"; then
     # importing from file
     true
   elif is_tar_import; then
     local CERTS_SET_TMP_WORK_DIR=$(mktemp -d "/tmp/dokku_certs_set.XXXX")
-    pushd "$CERTS_SET_TMP_WORK_DIR" &> /dev/null
+    pushd "$CERTS_SET_TMP_WORK_DIR" &>/dev/null
     trap 'popd &> /dev/null || true; rm -rf $CERTS_SET_TMP_WORK_DIR > /dev/null' RETURN
     tar xvf - <&0
 

plugins/certs/subcommands/default

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
 source "$PLUGIN_AVAILABLE_PATH/certs/internal-functions"
 
 dokku_log_warn "Deprecated: Please use certs:report"

plugins/certs/subcommands/generate

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
 source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
 source "$PLUGIN_AVAILABLE_PATH/domains/functions"
 
@@ -13,7 +14,7 @@ certs_generate_cmd() {
 
   if [[ ! -f "$APP_SSL_PATH/server.key" ]] && [[ ! -f "$APP_SSL_PATH/server.crt" ]]; then
     local CERTS_GENERATE_TMP_WORK_DIR=$(mktemp -d "/tmp/dokku_certs.XXXXXXXXX")
-    pushd "$CERTS_GENERATE_TMP_WORK_DIR" > /dev/null
+    pushd "$CERTS_GENERATE_TMP_WORK_DIR" >/dev/null
     trap 'popd &> /dev/null || true; rm -rf "$CERTS_GENERATE_TMP_WORK_DIR" > /dev/null' INT TERM EXIT
 
     openssl genrsa -out server.key 2048
@@ -22,7 +23,7 @@ certs_generate_cmd() {
 
     mkdir -p "$APP_SSL_PATH"
     dokku_log_info1 "Installing certificate and key..."
-    mv -f "$CERTS_GENERATE_TMP_WORK_DIR/server.crt" "$CERTS_GENERATE_TMP_WORK_DIR/server.csr" "$CERTS_GENERATE_TMP_WORK_DIR/server.key"  "$APP_SSL_PATH"
+    mv -f "$CERTS_GENERATE_TMP_WORK_DIR/server.crt" "$CERTS_GENERATE_TMP_WORK_DIR/server.csr" "$CERTS_GENERATE_TMP_WORK_DIR/server.key" "$APP_SSL_PATH"
     chmod 750 "$APP_SSL_PATH"
     chmod 640 "$APP_SSL_PATH/server.crt" "$APP_SSL_PATH/server.csr" "$APP_SSL_PATH/server.key"
     plugn trigger post-certs-update "$APP"

plugins/certs/subcommands/info

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
 source "$PLUGIN_AVAILABLE_PATH/certs/internal-functions"
 
 dokku_log_warn "Deprecated: Please use certs:report"

plugins/certs/subcommands/remove

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
 source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
 
 certs_remove_cmd() {
@@ -7,7 +8,8 @@ certs_remove_cmd() {
   local cmd="certs:remove"
   [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
   verify_app_name "$2"
-  local APP="$2"; local APP_SSL_PATH="$DOKKU_ROOT/$APP/tls"
+  local APP="$2"
+  local APP_SSL_PATH="$DOKKU_ROOT/$APP/tls"
 
   if [[ -d "$APP_SSL_PATH" ]]; then
     dokku_log_info1 "Removing SSL endpoint from $APP"

plugins/certs/subcommands/report

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 source "$PLUGIN_AVAILABLE_PATH/certs/internal-functions"
-set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+set -eo pipefail
+[[ $DOKKU_TRACE ]] && set -x
 
 cmd-certs-report "$@"