diff --git a/progressbar/__main__.py b/progressbar/__main__.py
index 0bfd7fb..b4b4e9a 100644
--- a/progressbar/__main__.py
+++ b/progressbar/__main__.py
@@ -62,14 +62,13 @@ def create_argument_parser() -> argparse.ArgumentParser:
     Create the argument parser for the `progressbar` command.
     """
 
-    parser = argparse.ArgumentParser(
-        description="""
+    description = """
         Monitor the progress of data through a pipe.
 
         Note that this is a Python implementation of the original `pv` command
         that is functional but not yet feature complete.
     """
-    )
+    parser = argparse.ArgumentParser(description=description)
 
     # Display switches
     parser.add_argument(
diff --git a/progressbar/bar.py b/progressbar/bar.py
index 34ba02c..c349370 100644
--- a/progressbar/bar.py
+++ b/progressbar/bar.py
@@ -368,7 +368,7 @@ def _format_widgets(self):
 
         count = len(expanding)
         while expanding:
-            portion = max(int(math.ceil(width * 1.0 / count)), 0)
+            portion = max(math.ceil(width / count), 0)
             index = expanding.pop()
             widget = result[index]
             count -= 1
@@ -410,7 +410,7 @@ def _handle_resize(
         self, signum: int | None = None, frame: None | FrameType = None
     ):
         "Tries to catch resize signals sent from the terminal."
-        w, h = utils.get_terminal_size()
+        w, _h = utils.get_terminal_size()
         self.term_width = w
 
     def finish(self):  # pragma: no cover
@@ -1095,8 +1095,7 @@ def currval(self):
         progressbar package.
         """
         warnings.warn(
-            'The usage of `currval` is deprecated, please use '
-            '`value` instead',
+            'The usage of `currval` is deprecated, please use `value` instead',
             DeprecationWarning,
             stacklevel=1,
         )
diff --git a/progressbar/env.py b/progressbar/env.py
index 3871c2e..d2faae0 100644
--- a/progressbar/env.py
+++ b/progressbar/env.py
@@ -185,5 +185,5 @@ def is_terminal(
     'vt(10[02]|220|320)',
 )
 ANSI_TERM_RE: re.Pattern[str] = re.compile(
-    f"^({'|'.join(ANSI_TERMS)})", re.IGNORECASE
+    f'^({"|".join(ANSI_TERMS)})', re.IGNORECASE
 )
diff --git a/pyproject.toml b/pyproject.toml
index 1a484a9..6374f98 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -207,7 +207,6 @@ strict = [
 reportIncompatibleMethodOverride = false
 reportUnnecessaryIsInstance = false
 reportUnnecessaryCast = false
-reportUnnecessaryTypeAssertion = false
 reportUnnecessaryComparison = false
 reportUnnecessaryContains = false
 
diff --git a/tests/test_stream.py b/tests/test_stream.py
index d14845d..e32bbd5 100644
--- a/tests/test_stream.py
+++ b/tests/test_stream.py
@@ -99,6 +99,19 @@ def test_no_newlines() -> None:
             bar.update(i)
 
 
+def test_update_keeps_colors_when_enabled() -> None:
+    stream = io.StringIO()
+    with progressbar.ProgressBar(
+        fd=stream,
+        widgets=['\033[92mgreen\033[0m'],
+        max_value=1,
+        enable_colors=True,
+    ) as bar:
+        bar.update(1)
+
+    assert '\033[92mgreen\033[0m' in stream.getvalue()
+
+
 @pytest.mark.parametrize('stream', [sys.__stdout__, sys.__stderr__])
 @pytest.mark.skipif(os.name == 'nt', reason='Windows does not support this')
 def test_fd_as_standard_streams(stream) -> None: