Update yf_docs.py

yf_docs.py

@@ -5,21 +5,18 @@ yf_docs = """
 
 ```python
 import yfinance as yf
-ticker = yf.Ticker('MSFT')
+ticker = yf.Ticker('MSFT') # Initialize single ticker
+data = ticker.history(period='6mo')
+data.columns, data.shape 
 ```
-
-## Multi-Ticker Usage
-
-### Initialization
-
+Returns:
 ```python
-import yfinance as yf
-tickers = yf.Tickers('MSFT AAPL GOOG')
-```
-
-### Download Historical Data
+(Index(['Open', 'High', 'Low', 'Close', 'Volume', 'Dividends', 'Stock Splits'], dtype='object'),
+ (126, 7))
+ ```
+## Multi-Ticker Usage
 
-Get historical market data for multiple tickers:
+# Get historical market data for multiple tickers:
 
 ```python
 # Method 1: Using Tickers object