*: fix failing shellchecks

- shellcheck violations fixed
- etcd-io#17400

Signed-off-by: vivekpatani <9080894+vivekpatani@users.noreply.github.com>

build.sh

@@ -22,18 +22,18 @@ CGO_ENABLED="${CGO_ENABLED:-0}"
 GO_LDFLAGS=(${GO_LDFLAGS:-} "-X=${VERSION_SYMBOL}=${GIT_SHA}")
 GO_BUILD_ENV=("CGO_ENABLED=${CGO_ENABLED}" "GO_BUILD_FLAGS=${GO_BUILD_FLAGS:-}" "GOOS=${GOOS}" "GOARCH=${GOARCH}")
 
-GOFAIL_VERSION=$(cd tools/mod && go list -m -f {{.Version}} go.etcd.io/gofail)
+GOFAIL_VERSION=$(cd tools/mod && go list -m -f '{{.Version}}' go.etcd.io/gofail)
 # enable/disable failpoints
 toggle_failpoints() {
   mode="$1"
   if command -v gofail >/dev/null 2>&1; then
     run gofail "$mode" server/etcdserver/ server/mvcc/ server/wal/ server/mvcc/backend/
     if [[ "$mode" == "enable" ]]; then
-      go get go.etcd.io/gofail@${GOFAIL_VERSION}
-      cd ./server && go get go.etcd.io/gofail@${GOFAIL_VERSION}
-      cd ../etcdutl && go get go.etcd.io/gofail@${GOFAIL_VERSION}
-      cd ../etcdctl && go get go.etcd.io/gofail@${GOFAIL_VERSION}
-      cd ../tests && go get go.etcd.io/gofail@${GOFAIL_VERSION}
+      go get go.etcd.io/gofail@"${GOFAIL_VERSION}"
+      cd ./server && go get go.etcd.io/gofail@"${GOFAIL_VERSION}"
+      cd ../etcdutl && go get go.etcd.io/gofail@"${GOFAIL_VERSION}"
+      cd ../etcdctl && go get go.etcd.io/gofail@"${GOFAIL_VERSION}"
+      cd ../tests && go get go.etcd.io/gofail@"${GOFAIL_VERSION}"
       cd ../
     else
       go mod tidy

scripts/install-marker.sh

@@ -10,7 +10,7 @@ if [ -z "$1" ]; then
 fi
 
 MARKER_URL=https://storage.googleapis.com/etcd/test-binaries/marker-v0.4.0-x86_64-unknown-linux-gnu
-if [ ${ARCH} == "darwin" ]; then
+if [ "${ARCH}" == "darwin" ]; then
     MARKER_URL=https://storage.googleapis.com/etcd/test-binaries/marker-v0.4.0-x86_64-apple-darwin
 fi