Fixes for @jbrockmendel review

pandas/core/internals/blocks.py

@@ -261,7 +261,7 @@ def make_block_same_class(self, values, placement=None, ndim=None):
 
     def __repr__(self) -> str:
         # don't want to print out all of the items here
-        name = pprint_thing(type(self).__name__)
+        name = type(self).__name__
         if self._is_single_block:
 
             result = "{name}: {len} dtype: {dtype}".format(

pandas/core/internals/managers.py

@@ -321,7 +321,7 @@ def __len__(self) -> int:
         return len(self.items)
 
     def __repr__(self) -> str:
-        output = pprint_thing(type(self).__name__)
+        output = type(self).__name__
         for i, ax in enumerate(self.axes):
             if i == 0:
                 output += "\nItems: {ax}".format(ax=ax)

pandas/core/series.py

@@ -256,7 +256,7 @@ def __init__(
             elif is_extension_array_dtype(data):
                 pass
             elif isinstance(data, (set, frozenset)):
-                raise TypeError("{0!r} type is unordered".format(type(data).__name__))
+                raise TypeError(f"{repr(type(data).__name__)} type is unordered")
             elif isinstance(data, ABCSparseArray):
                 # handle sparse passed here (and force conversion)
                 data = data.to_dense()
@@ -1569,9 +1569,8 @@ def to_string(
         # catch contract violations
         if not isinstance(result, str):
             raise AssertionError(
-                "result must be of type unicode, type"
-                " of result is {0!r}"
-                "".format(type(result).__name__)
+                "result must be of type str, type"
+                f" of result is {repr(type(result).__name__)}"
             )
 
         if buf is None: