feat: add one-liner to capitalize first letter of each word

@@ -180,6 +180,12 @@ merged_dict = dict(zip(keys, values))

```

**Example:** `keys=['a', 'b'], values=[1, 2] → {'a': 1, 'b': 2}`

## Capitalize the first letter of each word in a string

```python

' '.join(word.capitalize() for word in s.split())

```

**Example:** `"hello world" → "Hello World"`

## Swap two variables without a temporary one

```python

a, b = b, a