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.venv/lib/python3.10/site-packages/_pytest/assertion/truncate.py

@@ -3,6 +3,7 @@
 Current default behaviour is to truncate assertion explanations at
 terminal lines, unless running with an assertions verbosity level of at least 2 or running on CI.
 """
+from __future__ import annotations
 
 from typing import List
 from typing import Optional
@@ -18,8 +19,8 @@ USAGE_MSG = "use '-vv' to show"
 
 
 def truncate_if_required(
-    explanation: List[str], item: Item, max_length: Optional[int] = None
-) -> List[str]:
+    explanation: list[str], item: Item, max_length: int | None = None,
+) -> list[str]:
     """Truncate this assertion explanation if the given test item is eligible."""
     if _should_truncate_item(item):
         return _truncate_explanation(explanation)
@@ -33,10 +34,10 @@ def _should_truncate_item(item: Item) -> bool:
 
 
 def _truncate_explanation(
-    input_lines: List[str],
-    max_lines: Optional[int] = None,
-    max_chars: Optional[int] = None,
-) -> List[str]:
+    input_lines: list[str],
+    max_lines: int | None = None,
+    max_chars: int | None = None,
+) -> list[str]:
     """Truncate given list of strings that makes up the assertion explanation.
 
     Truncates to either 8 lines, or 640 characters - whichever the input reaches
@@ -49,7 +50,7 @@ def _truncate_explanation(
         max_chars = DEFAULT_MAX_CHARS
 
     # Check if truncation required
-    input_char_count = len("".join(input_lines))
+    input_char_count = len(''.join(input_lines))
     # The length of the truncation explanation depends on the number of lines
     # removed but is at least 68 characters:
     # The real value is
@@ -67,17 +68,17 @@ def _truncate_explanation(
     # The truncation explanation add two lines to the output
     tolerable_max_lines = max_lines + 2
     if (
-        len(input_lines) <= tolerable_max_lines
-        and input_char_count <= tolerable_max_chars
+        len(input_lines) <= tolerable_max_lines and
+        input_char_count <= tolerable_max_chars
     ):
         return input_lines
     # Truncate first to max_lines, and then truncate to max_chars if necessary
     truncated_explanation = input_lines[:max_lines]
     truncated_char = True
     # We reevaluate the need to truncate chars following removal of some lines
-    if len("".join(truncated_explanation)) > tolerable_max_chars:
+    if len(''.join(truncated_explanation)) > tolerable_max_chars:
         truncated_explanation = _truncate_by_char_count(
-            truncated_explanation, max_chars
+            truncated_explanation, max_chars,
         )
     else:
         truncated_char = False
@@ -85,22 +86,22 @@ def _truncate_explanation(
     truncated_line_count = len(input_lines) - len(truncated_explanation)
     if truncated_explanation[-1]:
         # Add ellipsis and take into account part-truncated final line
-        truncated_explanation[-1] = truncated_explanation[-1] + "..."
+        truncated_explanation[-1] = truncated_explanation[-1] + '...'
         if truncated_char:
             # It's possible that we did not remove any char from this line
             truncated_line_count += 1
     else:
         # Add proper ellipsis when we were able to fit a full line exactly
-        truncated_explanation[-1] = "..."
+        truncated_explanation[-1] = '...'
     return [
         *truncated_explanation,
-        "",
-        f"...Full output truncated ({truncated_line_count} line"
+        '',
+        f'...Full output truncated ({truncated_line_count} line'
         f"{'' if truncated_line_count == 1 else 's'} hidden), {USAGE_MSG}",
     ]
 
 
-def _truncate_by_char_count(input_lines: List[str], max_chars: int) -> List[str]:
+def _truncate_by_char_count(input_lines: list[str], max_chars: int) -> list[str]:
     # Find point at which input length exceeds total allowed length
     iterated_char_count = 0
     for iterated_index, input_line in enumerate(input_lines):