Move images from docs to docs/general to make it available for mkdocs (…

…#79)

* moving images to docs/general folder

* changing path in README

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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README.md

@@ -11,9 +11,9 @@ DataFrames are optimized for simultaneous operations through [SIMD processing](h
 
 The following is a performance graph showing execution time using mesa and mesa-frames for the [Boltzmann Wealth model](https://mesa.readthedocs.io/en/stable/tutorials/intro_tutorial.html).
 
-![Performance Graph](https://github.com/adamamer20/mesa_frames/blob/main/docs/images/readme_plot_0.png)
+![Performance Graph](https://github.com/adamamer20/mesa_frames/blob/main/docs/general/images/readme_plot_0.png)
 
-![Performance Graph without Mesa](https://github.com/adamamer20/mesa_frames/blob/main/docs/images/readme_plot_1.png)
+![Performance Graph without Mesa](https://github.com/adamamer20/mesa_frames/blob/main/docs/general/images/readme_plot_1.png)
 
 (The script used to generate the graph can be found [here](https://github.com/adamamer20/mesa_frames/blob/main/docs/scripts/readme_plot.py), but if you want to additionally compare vs Mesa, you have to uncomment `mesa_implementation` and its label)
 

mesa_frames/concrete/pandas/mixin.py

@@ -316,7 +316,7 @@ def _prepare_df(df: pd.DataFrame, on: str | list[str] | None) -> pd.DataFrame:
             # Reset index if it is not used as a key to keep it in the DataFrame
             if df.index.name is not None or df.index.names[0] is not None:
                 df = df.reset_index()
-            df  = df.set_index(on)
+            df = df.set_index(on)
             return df
 
         left_index = False