Simplify Capitalize Function (#12879)

* Simplify the capitalize function using ASCII arithmetic to make the algorithm five times faster.

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

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* Update capitalize.py

* Update capitalize.py

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Maxim Smolskiy <[email protected]>

Author: 3 people

strings/capitalize.py

@@ -1,6 +1,3 @@
-from string import ascii_lowercase, ascii_uppercase
-
-
 def capitalize(sentence: str) -> str:
     """
     Capitalizes the first letter of a sentence or word.
@@ -19,11 +16,9 @@ def capitalize(sentence: str) -> str:
     if not sentence:
         return ""
 
-    # Create a dictionary that maps lowercase letters to uppercase letters
     # Capitalize the first character if it's a lowercase letter
     # Concatenate the capitalized character with the rest of the string
-    lower_to_upper = dict(zip(ascii_lowercase, ascii_uppercase))
-    return lower_to_upper.get(sentence[0], sentence[0]) + sentence[1:]
+    return sentence[0].upper() + sentence[1:]
 
 
 if __name__ == "__main__":