gh-126882: Fix indentation in code sample block (#126887)

Author: javert42

InternalDocs/garbage_collector.md

@@ -17,26 +17,26 @@ value returned by this function is always 1 more as the function also has a refe
 to the object when called):
 
 ```pycon
-    >>> x = object()
-    >>> sys.getrefcount(x)
-    2
-    >>> y = x
-    >>> sys.getrefcount(x)
-    3
-    >>> del y
-    >>> sys.getrefcount(x)
-    2
+>>> x = object()
+>>> sys.getrefcount(x)
+2
+>>> y = x
+>>> sys.getrefcount(x)
+3
+>>> del y
+>>> sys.getrefcount(x)
+2
 ```
 
 The main problem with the reference counting scheme is that it does not handle reference
 cycles. For instance, consider this code:
 
 ```pycon
-    >>> container = []
-    >>> container.append(container)
-    >>> sys.getrefcount(container)
-    3
-    >>> del container
+>>> container = []
+>>> container.append(container)
+>>> sys.getrefcount(container)
+3
+>>> del container
 ```
 
 In this example, `container` holds a reference to itself, so even when we remove
@@ -199,26 +199,26 @@ variable `A`, and one self-referencing object which is completely
 unreachable:
 
 ```pycon
-    >>> import gc
-
-    >>> class Link:
-    ...    def __init__(self, next_link=None):
-    ...        self.next_link = next_link
-
-    >>> link_3 = Link()
-    >>> link_2 = Link(link_3)
-    >>> link_1 = Link(link_2)
-    >>> link_3.next_link = link_1
-    >>> A = link_1
-    >>> del link_1, link_2, link_3
-
-    >>> link_4 = Link()
-    >>> link_4.next_link = link_4
-    >>> del link_4
-
-    # Collect the unreachable Link object (and its .__dict__ dict).
-    >>> gc.collect()
-    2
+>>> import gc
+>>> 
+>>> class Link:
+...    def __init__(self, next_link=None):
+...        self.next_link = next_link
+...  
+>>> link_3 = Link()
+>>> link_2 = Link(link_3)
+>>> link_1 = Link(link_2)
+>>> link_3.next_link = link_1
+>>> A = link_1
+>>> del link_1, link_2, link_3
+>>> 
+>>> link_4 = Link()
+>>> link_4.next_link = link_4
+>>> del link_4
+>>> 
+>>> # Collect the unreachable Link object (and its .__dict__ dict).
+>>> gc.collect()
+2
 ```
 
 The GC starts with a set of candidate objects it wants to scan.  In the
@@ -439,48 +439,42 @@ These thresholds can be examined using the
 function:
 
 ```pycon
-    >>> import gc
-    >>> gc.get_threshold()
-    (700, 10, 10)
+>>> import gc
+>>> gc.get_threshold()
+(700, 10, 10)
 ```
 
 The content of these generations can be examined using the
 `gc.get_objects(generation=NUM)` function and collections can be triggered
 specifically in a generation by calling `gc.collect(generation=NUM)`.
 
 ```pycon
-    >>> import gc
-    >>> class MyObj:
-    ...     pass
-    ...
-
-    # Move everything to the old generation so it's easier to inspect
-    # the young generation.
-
-    >>> gc.collect()
-    0
-
-    # Create a reference cycle.
-
-    >>> x = MyObj()
-    >>> x.self = x
-
-    # Initially the object is in the young generation.
-
-    >>> gc.get_objects(generation=0)
-    [..., <__main__.MyObj object at 0x7fbcc12a3400>, ...]
-
-    # After a collection of the youngest generation the object
-    # moves to the old generation.
-
-    >>> gc.collect(generation=0)
-    0
-    >>> gc.get_objects(generation=0)
-    []
-    >>> gc.get_objects(generation=1)
-    []
-    >>> gc.get_objects(generation=2)
-    [..., <__main__.MyObj object at 0x7fbcc12a3400>, ...]
+>>> import gc
+>>> class MyObj:
+...     pass
+...
+>>> # Move everything to the old generation so it's easier to inspect
+>>> # the young generation.
+>>> gc.collect()
+0
+>>> # Create a reference cycle.
+>>> x = MyObj()
+>>> x.self = x
+>>> 
+>>> # Initially the object is in the young generation.
+>>> gc.get_objects(generation=0)
+[..., <__main__.MyObj object at 0x7fbcc12a3400>, ...]
+>>> 
+>>> # After a collection of the youngest generation the object
+>>> # moves to the old generation.
+>>> gc.collect(generation=0)
+0
+>>> gc.get_objects(generation=0)
+[]
+>>> gc.get_objects(generation=1)
+[]
+>>> gc.get_objects(generation=2)
+[..., <__main__.MyObj object at 0x7fbcc12a3400>, ...]
 ```
 
 
@@ -563,18 +557,18 @@ the current tracking status of the object. Subsequent garbage collections may ch
 tracking status of the object.
 
 ```pycon
-      >>> gc.is_tracked(0)
-      False
-      >>> gc.is_tracked("a")
-      False
-      >>> gc.is_tracked([])
-      True
-      >>> gc.is_tracked(())
-      False
-      >>> gc.is_tracked({})
-      True
-      >>> gc.is_tracked({"a": 1})
-      True
+>>> gc.is_tracked(0)
+False
+>>> gc.is_tracked("a")
+False
+>>> gc.is_tracked([])
+True
+>>> gc.is_tracked(())
+False
+>>> gc.is_tracked({})
+True
+>>> gc.is_tracked({"a": 1})
+True
 ```
 
 Differences between GC implementations