Merge pull request #10697 from ipython/auto-backport-of-pr-10696

Backport PR  #10696 on branch 5.x

IPython/core/compilerop.py

@@ -56,7 +56,7 b' def code_name(code, number=0):'
     
     This now expects code to be unicode.
     """
-    hash_digest = hashlib.md5(code.encode("utf-8")).hexdigest()
+    hash_digest = hashlib.sha1(code.encode("utf-8")).hexdigest()
     # Include the number and 12 characters of the hash in the name.  It's
     # pretty much impossible that in a single session we'll have collisions
     # even with truncated hashes, and the full one makes tracebacks too long