shadows-compare-text-p

shadows-compare-text-p is a variable defined in `shadow.el'.
Its value is

nil

• This variable is an alias for `load-path-shadows-compare-text'.
• This variable is obsolete since 23.3;
  use `load-path-shadows-compare-text' instead.

Documentation:
If non-nil, then shadowing files are reported only if their text differs.
This is slower, but filters out some innocuous shadowing.

You can customize this variable.