docs: fixed links

Author: 15r10nk

docs/external/external.md

@@ -7,7 +7,7 @@ This has the advantage that you can easily see changes in code reviews. However,
 `external()` solves this problem and integrates nicely with inline snapshots.
 It stores a reference to the external data in a special `external()` object, which can be used like `snapshot()`.
 
-There are different storage protocols, such as [*hash*](#hash) or [*uuid*](#uuid), and different file formats, such as *.txt*, *.bin*, and *.json*. It is also possible to implement [*custom*](#custom-formats) file formats.
+There are different storage protocols, such as [*hash*](#hash) or [*uuid*](#uuid), and different file formats, such as *.txt*, *.bin*, and *.json*. It is also possible to implement [*custom*](register_format.md) file formats.
 
 
 Example:

docs/external/register_format.md

@@ -12,7 +12,7 @@ from typing import List
 class Array:
     numbers: List[int]
 ```
-
+[](){#array-example}
 <!-- inline-snapshot-lib: conftest.py -->
 ``` python title="conftest.py"
 from pathlib import Path
@@ -69,7 +69,7 @@ def test_array():
 
 ### Report
 
-inline-snapshot needs to know how changes in your external files should be displayed. `TextDiff` and `BinaryDiff` can be used as mixin classes (see the example in [custom formats](#custom-formats)) to provide generic representations for text or binary formats, but you can also define custom functions for your files.
+inline-snapshot needs to know how changes in your external files should be displayed. `TextDiff` and `BinaryDiff` can be used as mixin classes (see the `Array` example (above)[#array-example]) to provide generic representations for text or binary formats, but you can also define custom functions for your files.
 
 * `rich_diff()` is used every time the external snapshot value is changed and should show the difference between the original and new versions in a human-readable form.
 * `rich_show()` is used every time an external snapshot is created and should show a human-readable form of the initial value.

src/inline_snapshot/_external/_format/_protocol.py

@@ -214,8 +214,7 @@ class MyFormat: ...
         replace_handler: If `True`, replaces an existing handler for the same suffix.
 
     Raises:
-        UsageError: If a handler for the same suffix already exists and
-        `replace_handler` is not set to `True`.
+        UsageError: If a handler for the same suffix already exists and `replace_handler` is not set to `True`.
     """
     if format is None:
         return partial(register_format, replace_handler=replace_handler)