[BUG] Syntax Error;

[rishbobby]

There was a syntax error in Example 1-1, Line 20; Accidental capitalization of "x" to "X"

To Reproduce

import numpy as np
import pandas as pd
from sklearn.linear_model import LinearRegression

# Download and prepare the data
data_root = "https://github.com/ageron/data/raw/main/"
lifesat = pd.read_csv(data_root + "lifesat/lifesat.csv")
x = lifesat[["GDP per capita (USD)"]].values
y = lifesat[["Life satisfaction"]].values

# Visualize the data
lifesat.plot(kind= "scatter", grid = True,
             x = "GDP per capita (USD)", y = "Life satisfaction")
plt.axis([23_500, 62_500, 4, 9])
plt.show()

# Select a linear model
model = LinearRegression()

# Train the model
model.fit(X, y)

X_new = [[37_655]] # Cyprus' GDP per capita in 2020
print(model.predict(X_new)) # output: [[6.30165767]]

Exception:

Traceback (most recent call last):
  File "/Users/##############/Library/Mobile Documents/com~apple~CloudDocs/Programs/python/###.py", line 22, in <module>
    model.fit(X, y)
              ^
NameError: name 'X' is not defined. Did you mean: 'x'?

Not the biggest issue, just thought to let you guys know 👍