Fix diff output for data types where -v would show less information (#9661)

Close #5192

src/_pytest/assertion/util.py

@@ -223,8 +223,6 @@ def _compare_eq_any(left: Any, right: Any, verbose: int = 0) -> List[str]:
             explanation = _compare_eq_set(left, right, verbose)
         elif isdict(left) and isdict(right):
             explanation = _compare_eq_dict(left, right, verbose)
-        elif verbose > 0:
-            explanation = _compare_eq_verbose(left, right)
 
         if isiterable(left) and isiterable(right):
             expl = _compare_eq_iterable(left, right, verbose)
@@ -281,18 +279,6 @@ def _diff_text(left: str, right: str, verbose: int = 0) -> List[str]:
     return explanation
 
 
-def _compare_eq_verbose(left: Any, right: Any) -> List[str]:
-    keepends = True
-    left_lines = repr(left).splitlines(keepends)
-    right_lines = repr(right).splitlines(keepends)
-
-    explanation: List[str] = []
-    explanation += ["+" + line for line in left_lines]
-    explanation += ["-" + line for line in right_lines]
-
-    return explanation
-
-
 def _surrounding_parens_on_own_lines(lines: List[str]) -> None:
     """Move opening/closing parenthesis/bracket to own lines."""
     opening = lines[0][:1]
@@ -308,8 +294,8 @@ def _surrounding_parens_on_own_lines(lines: List[str]) -> None:
 def _compare_eq_iterable(
     left: Iterable[Any], right: Iterable[Any], verbose: int = 0
 ) -> List[str]:
-    if not verbose and not running_on_ci():
-        return ["Use -v to get the full diff"]
+    if verbose <= 0 and not running_on_ci():
+        return ["Use -v to get more diff"]
     # dynamic import to speedup pytest
     import difflib