fix tab size issue

Author: willmcgugan

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [13.5.2] - 2023-08-01
+
+### Fixed
+
+- Fixed Text.expand_tab assertion error
+
 ## [13.5.1] - 2023-07-31
 
 ### Fixed
@@ -1988,6 +1994,7 @@ Major version bump for a breaking change to `Text.stylize signature`, which corr
 
 - First official release, API still to be stabilized
 
+[13.5.2]: https://github.com/textualize/rich/compare/v13.5.1...v13.5.2
 [13.5.1]: https://github.com/textualize/rich/compare/v13.5.0...v13.5.1
 [13.5.0]: https://github.com/textualize/rich/compare/v13.4.2...v13.5.0 
 [13.4.2]: https://github.com/textualize/rich/compare/v13.4.1...v13.4.2  

pyproject.toml

@@ -2,7 +2,7 @@
 name = "rich"
 homepage = "https://github.com/Textualize/rich"
 documentation = "https://rich.readthedocs.io/en/latest/"
-version = "13.5.1"
+version = "13.5.2"
 description = "Render rich text, tables, progress bars, syntax highlighting, markdown and more to the terminal"
 authors = ["Will McGugan <[email protected]>"]
 license = "MIT"

rich/text.py

@@ -819,7 +819,9 @@ def expand_tabs(self, tab_size: Optional[int] = None) -> None:
             return
         if tab_size is None:
             tab_size = self.tab_size
-        assert tab_size is not None
+        if tab_size is None:
+            tab_size = 8
+
         result = self.blank_copy()
 
         new_text: List[Text] = []