Fix failure to properly escape & (Azure#46116)

* Fix failure to properly encode &

* Use html escape

Author: jairmyree

eng/pipelines/scripts/generate_overview_from_readme.py

@@ -15,6 +15,7 @@
 # will be written to overview file. If there is a readme, its contents will be added after that.
 
 import argparse
+import html
 from bs4 import BeautifulSoup
 import pdb
 import markdown2
@@ -43,12 +44,17 @@ def generate_overview(readme_file, version, overview_file_path):
     if (readme_exists):
         with open(readme_file, 'r', encoding='utf-8') as f:
             raw_readme_content_lines = f.readlines()
-
+            
+        # Replace all instances of & with & in the raw readme content
+        escaped_readme_content_lines = []
+        for line in raw_readme_content_lines:
+            escaped_readme_content_lines.append(html.escape(line, quote=True))
+            
         # Before passing the README contents to markdown2 clean out the codesnippet tags on the java code fences.
         # Clean ```java com.azure.core.aCodeSnippetTag to ```java, without doing this markdown2 won't properly process
-        # the contents of the code fence.
+        # the contents of the code fence. 
         cleaned_readme_content_lines = []
-        for line in raw_readme_content_lines:
+        for line in escaped_readme_content_lines:
             cleaned_readme_content_lines.append(re.sub(pattern="``` *java +[a-zA-Z0-9.#\-_]*", repl="```java", string=line, flags=re.UNICODE))
 
         readme_content = ''.join(cleaned_readme_content_lines)
@@ -107,4 +113,4 @@ def main():
         raise ValueError('{} is not a readmefile. The --readme-file argument must be a readme.md file.'.format(args.readme_file))
 
 if __name__ == '__main__':
-    main()
+    main()