Summary

Added concrete return type annotations to functions in IPython/core/completer.py based on static analysis of return statements.

Changes

• Add return type hint -> list to function
• Add return type hint -> list to function
• Add return type hint -> tuple to function
• Add return type hint -> bool to function
• Add return type hint -> list to function

Type of Change

• Code quality improvement (type hints)
• Bug fix
• New feature

Motivation

These type annotations are inferred from actual return values in the function bodies (e.g. return True → -> bool, return [] → -> list). They improve:

• IDE autocompletion and type checking (mypy/pyright)
• Code readability for contributors navigating the codebase
• Bug prevention via static analysis

No functional changes — only type annotations added.