Fix typos and stale docstrings in Lib/traceback.py.

Author: devdanzin

Lib/traceback.py

@@ -83,10 +83,11 @@ def extract_tb(tb, limit=None):
     This is useful for alternate formatting of stack traces.  If
     'limit' is omitted or None, all entries are extracted.  A
     pre-processed stack trace entry is a FrameSummary object
-    containing attributes filename, lineno, name, and line
-    representing the information that is usually printed for a stack
-    trace.  The line is a string with leading and trailing
-    whitespace stripped; if the source is not available it is None.
+    containing attributes filename, lineno, name, line, end_lineno,
+    colno, and end_colno representing the information that is
+    usually printed for a stack trace.  The line is a string with
+    leading and trailing whitespace stripped; if the source is not
+    available it is None.
     """
     return StackSummary._extract_from_extended_frame_gen(
         _walk_tb_with_full_positions(tb), limit=limit)
@@ -263,9 +264,8 @@ def extract_stack(f=None, limit=None):
 
     The return value has the same format as for extract_tb().  The
     optional 'f' and 'limit' arguments have the same meaning as for
-    print_stack().  Each item in the list is a quadruple (filename,
-    line number, function name, text), and the entries are in order
-    from oldest to newest stack frame.
+    print_stack().  Each item in the list is a FrameSummary object,
+    and the entries are in order from oldest to newest stack frame.
     """
     if f is None:
         f = sys._getframe().f_back
@@ -294,7 +294,7 @@ class FrameSummary:
     - :attr:`name` The name of the function or method that was executing
       when the frame was captured.
     - :attr:`line` The text from the linecache module for the
-      of code that was running when the frame was captured.
+      code that was running when the frame was captured.
     - :attr:`locals` Either None if locals were not supplied, or a dict
       mapping the name to the repr() of the variable.
     - :attr:`end_lineno` The last line number of the source code for this frame.
@@ -974,9 +974,9 @@ def setup_positions(expr, force_valid=True):
 _WIDE_CHAR_SPECIFIERS = "WF"
 
 def _display_width(line, offset=None):
-    """Calculate the extra amount of width space the given source
-    code segment might take if it were to be displayed on a fixed
-    width output device. Supports wide unicode characters and emojis."""
+    """Calculate the amount of width space the given source code
+    segment might take if it were to be displayed on a fixed width
+    output device. Supports wide unicode characters and emojis."""
 
     if offset is None:
         offset = len(line)
@@ -1060,7 +1060,7 @@ class TracebackException:
     def __init__(self, exc_type, exc_value, exc_traceback, *, limit=None,
             lookup_lines=True, capture_locals=False, compact=False,
             max_group_width=15, max_group_depth=10, save_exc_type=True, _seen=None):
-        # NB: we need to accept exc_traceback, exc_value, exc_traceback to
+        # NB: we need to accept exc_type, exc_value, exc_traceback to
         # permit backwards compat with the existing API, otherwise we
         # need stub thunk objects just to glue it together.
         # Handle loops in __cause__ or __context__.