Fix AI slop issues in docs

doc/en/example/nonpython.rst

@@ -62,7 +62,7 @@ consulted when reporting in ``verbose`` mode. It should return a tuple
 ``(path, lineno, description)``, where:
 
 * ``path`` is the path shown in reports (usually ``self.path`` or ``self.fspath``).
-* ``lineno`` is a zero-based line number, or ``0`` when no specific line applies.
+* ``lineno`` is the line number, or ``0`` when no specific line applies.
 * ``description`` is a short label shown for the collected item:
 
 .. code-block:: pytest

doc/en/how-to/assert.rst

@@ -432,10 +432,6 @@ Special comparisons are done for a number of cases:
 * comparing long sequences: first failing indices
 * comparing dicts: different entries
 
-In string context diffs, lines prefixed with ``-`` come from the left-hand side
-of ``assert left == right``, while lines prefixed with ``+`` come from the
-right-hand side.
-
 See the :ref:`reporting demo <tbreportdemo>` for many more examples.
 
 Defining your own explanation for failed assertions

doc/en/reference/customize.rst

@@ -104,7 +104,7 @@ pyproject.toml
         ]
 
     For projects that still run pytest versions older than 6.0, keep
-    ``minversion`` in ``pytest.ini`` or ``setup.cfg`` too. Those versions
+    ``minversion`` in ``pytest.ini`` or ``tox.ini`` too. Those versions
     do not read ``pyproject.toml``.
 
 tox.ini