Fix typos in comments and add explanations about usage of tee

Co-authored-by: Pushkar Joglekar <3390906+PushkarJ@users.noreply.github.com>

Author: mtardy

sig-security-tooling/cve-feed/hack/fetch-cve-feed.sh

@@ -17,17 +17,18 @@ set -o nounset
 set -o errexit
 set -o pipefail
 
-#install python-pip3
+# install python-pip3
 apt-get update
 apt-get install -y python3-pip
 
-#install requests module
+# install requests module
 pip3 install requests
 
-#python script to generate official-cve-feed.json 
+# python script to generate official-cve-feed.json 
+# tee duplicates the output from the script to stdout for logs and the JSON file
 python3 fetch-official-cve-feed.py | tee official_cve_feed.json
 
-#function to calculate the hash value of official-cve-feed.json 
+# function to calculate the hash value of official-cve-feed.json 
 calculate_hash(){
  if command -v shasum >/dev/null 2>&1; then
  cat "$@" | shasum -a 256 | cut -d' ' -f1
@@ -39,12 +40,13 @@ calculate_hash(){
  fi
 }
 
-#check if official-cve-feed.json blob exists in the bucket
+# check if official-cve-feed.json blob exists in the bucket
 set -e
 EXIT_CODE=0
 gsutil ls gs://k8s-cve-feed/official-cve-feed.json >/dev/null 2>&1 || EXIT_CODE=$?
 
-#fetch the hash value of existing official-cve-feed.json json, if differs then upload the new cve feed data to the existing blob.
+# fetch the hash value of existing official-cve-feed.json json, if differs then
+# upload the new cve feed data to the existing blob.
 if [[ $EXIT_CODE -eq 1 ]]; then 
  gsutil cp official-cve-feed.json gs://k8s-cve-feed
  calculate_hash official-cve-feed.json > cve-feed-hash

sig-security-tooling/cve-feed/hack/fetch-official-cve-feed.py

@@ -66,7 +66,7 @@
  cve['_kubernetes_io']['issue_number'] = item['number']
  cve['content_text'] = item['body']
  cve['date_published'] = item['created_at']
- # This because some CVEs were titled "CVE-XXXX-XXXX - Something" instead of
+ # This is because some CVEs were titled "CVE-XXXX-XXXX - Something" instead of
  # "CVE-XXXX-XXXX: Something" on GitHub (see https://github.com/kubernetes/kubernetes/issues/60813).
  title = item['title'].replace(' -', ':')
  # This splits the CVE into its ID and the description/name, however some are in the following forms: