Spanify plugin: fix patches not getting unescaped

crrev.com/c/5875412 introduced escaping. It unescaped the stdout output
but it didn't unescape the individual patches. This CL moves the
unescaping to the parsing of the input.

Change-Id: Iaf33d5cb76f092db71d6969147d45feaa2340095
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5960698
Reviewed-by: Takashi Sakamoto <tasak@google.com>
Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1374569}

tools/clang/spanify/extract_edits.py

@@ -147,6 +147,10 @@ class Node:
 
         node = Node(*x)
 
+        # replacement and include_directive fields are percent-encoded.
+        node.replacement = urllib.parse.unquote(node.replacement)
+        node.include_directive = urllib.parse.unquote(node.include_directive)
+
         # Deduplicate nodes, as they might appear multiple times in the input.
         if (Node.key_to_node.get(node.replacement) is None):
             Node.key_to_node[node.replacement] = node
@@ -382,7 +386,7 @@ def main():
 
     for index, component in enumerate(component_with_changes):
         for text in component.changes:
-            print(urllib.parse.unquote(text).replace('\n', '\0'))
+            print(text.replace('\n', '\0'))
 
         summary_file.write(f'patch_{index}: {len(component.changes)}\n')