refactor(utils): print_ww signature & docs

Make `width` an explicit kwarg of `print_ww` to make the method
signature more informative and avoid unnecessary dict modification
step. Add docstrings & comments & lint.

utils/__init__.py

@@ -1,23 +1,21 @@
-import textwrap
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: MIT-0
+"""General helper utilities the workshop notebooks"""
+# Python Built-Ins:
 from io import StringIO
 import sys
+import textwrap
+
 
-def print_ww(*args, **kwargs):
+def print_ww(*args, width: int = 100, **kwargs):
+    """Like print(), but wraps output to `width` characters (default 100)"""
     buffer = StringIO()
-    try: 
+    try:
         _stdout = sys.stdout
         sys.stdout = buffer
-        width = 100
-        if 'width' in kwargs:
-            width = kwargs['width']
-            del kwargs['width']
         print(*args, **kwargs)
-        output = buffer.getvalue()    
+        output = buffer.getvalue()
     finally:
         sys.stdout = _stdout
     for line in output.splitlines():
         print("\n".join(textwrap.wrap(line, width=width)))
-
-
-
-