chore(docs): fix typos, use doublequotes in shell scripts (GoogleCloudPlatform#1588)

Author: bluPhy

logging/README.md

@@ -18,7 +18,7 @@ To use logging sinks, you will also need a Google Cloud Storage Bucket.
 
 You must add Cloud Logging as an owner to the bucket. To do so, add
 `[email protected]` as an owner to the bucket. See the
-[exportings logs](https://cloud.google.com/logging/docs/export/configure_export#configuring_log_sinks)
+[exporting logs](https://cloud.google.com/logging/docs/export/configure_export#configuring_log_sinks)
 docs for complete details.
 
 # Running locally

testing/run_cs_check.sh

@@ -19,7 +19,7 @@ PROJECT_ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )/.."
 DIR="${1:-$PROJECT_ROOT}"
 
 # we run the script from PROJECT_ROOT
-cd $PROJECT_ROOT
+cd "$PROJECT_ROOT"
 
 # install local version of php-cs-fixer 3.0 from composer.json
 composer -q install -d testing/
@@ -30,4 +30,4 @@ if [ -f "testing/vendor/bin/php-cs-fixer" ]; then
     PHP_CS_FIXER="testing/vendor/bin/php-cs-fixer"
 fi
 
-$PHP_CS_FIXER fix --dry-run --diff --config="${PROJECT_ROOT}/.php-cs-fixer.dist.php" --path-mode=intersection $DIR
+$PHP_CS_FIXER fix --dry-run --diff --config="${PROJECT_ROOT}/.php-cs-fixer.dist.php" --path-mode=intersection "$DIR"