Let me investigate this bug. The issue is that `plt.hist` no longer respects `range=...` when `density=True`. The bins should start at 0 and end at 1 when range=(0, 1), but instead they start at 0.0033 and end at 0.9332. This was bisected to a commit in PR #8638. Let me look at the relevant code. Let me first find the hist-related code in the matplotlib source.

Let me look at the hist implementation in _axes.py.

Let me look at the `hist` method in _axes.py.

Let me check the read_file signature.

Let me continue reading the hist method to see its implementation.

Now I see the issue. Let me focus on the key part. When density=True, the code does: ```python if density and not stacked: hist_kwargs = dict(density=density) ``` This creates a new dictionary `hist_kwargs` that only has `density=density`, overwriting the previously set `hist_kwargs['range'] = bin_range`. So the `range` parameter is lost when `density=True` and `stacked=False`. Let me verify this by looking at the relevant lines more carefully: Line ~6472: ```python hist_kwargs = dict() ``` Line ~6498: ```python hist_kwargs['range'] = bin_range ``` Line ~6503: ```python density = bool(density) or bool(normed) if density and not stacked: hist_kwargs = dict(density=density) ``` Yes, that's the bug. `hist_kwargs` is initialized as an empty dict, then optionally set with `hist_kwargs['range'] = bin_range`, and then when `density=True` and not stacked, it's replaced entirely with a new dict containing only `density=density`. The fix should be: ```python if density and not stacked: hist_kwargs['density'] = density ``` Instead of: ```python if density and not stacked: hist_kwargs = dict(density=density) ``` Let me confirm this by checking the commit the user mentioned. The PR #8638 likely introduced this bug by changing how `hist_kwargs` is handled. Let me fix it.

I can see the bug. Let me verify by reading the exact lines:

The read_file function doesn't accept offset. Let me use run_bash to read the lines.

That's the docstring. Let me search for the actual buggy line.

Now I can see the bug. Lines 6685 and 6689: ```python hist_kwargs['range'] = bin_range ``` and then: ```python hist_kwargs = dict(density=density) ``` The second line replaces the entire `hist_kwargs` dict with a new one, losing the `'range'` key that was set earlier. The fix is simple: change line 6689 to `hist_kwargs['density'] = density` instead of `hist_kwargs = dict(density=density)`. Let me see the full context around those lines.

Now I can clearly see the bug. On line 6685, `hist_kwargs['range'] = bin_range` sets the range in the dict. But then on line 6689, `hist_kwargs = dict(density=density)` replaces the entire dict with a new one that only contains `density`, losing the `range` key. The fix is to change line 6689 from `hist_kwargs = dict(density=density)` to `hist_kwargs['density'] = density`.

Found the bug. On line 6689, `hist_kwargs = dict(density=density)` creates a **new** dictionary, which discards the `'range'` key previously set on line 6685. The fix is to set the key on the existing dict instead:

Now let me verify the fix by running the reproduction code from the bug report.

Now let me verify the fix with the reproduction code from the bug report:

The fix works. The bins now correctly start at 0.0 and end at 1.0. Let me also make sure the density=False case still works correctly, and confirm that the fix doesn't break anything else.

The fix works. Let me also verify that `density=False` still works and that `density=True` without explicit `range` still works: