Author: Baranov Victor
Date: 2025-12-06T13:03:47+03:00
New Revision: af27159e17b91cc5f49c2b6ed24f3d422312d6ec

URL: 
https://github.com/llvm/llvm-project/commit/af27159e17b91cc5f49c2b6ed24f3d422312d6ec
DIFF: 
https://github.com/llvm/llvm-project/commit/af27159e17b91cc5f49c2b6ed24f3d422312d6ec.diff

LOG: [clang-tidy] Show correct diff instructions when 
check_alphabetical_order.py fails (#170971)

Before the change, when given such incorrect ordering:
```
   :doc:`modernize-use-designated-initializers 
<modernize/use-designated-initializers>`, "Yes"
   :doc:`modernize-use-equals-default <modernize/use-equals-default>`, "Yes"
   :doc:`modernize-use-emplace <modernize/use-emplace>`, "Yes"
   :doc:`modernize-use-equals-delete <modernize/use-equals-delete>`, "Yes"
   :doc:`modernize-use-integer-sign-comparison 
<modernize/use-integer-sign-comparison>`, "Yes"
```
Script output suggested removing `modernize-use-equals-default` line
that came after `modernize-use-emplace` but in my actual file, we can
see that current ordering is different (same as 2nd part of the diff):
```
# |      :doc:`modernize-use-constraints <modernize/use-constraints>`, "Yes"
# |      :doc:`modernize-use-default-member-init 
<modernize/use-default-member-init>`, "Yes"
# |      :doc:`modernize-use-designated-initializers 
<modernize/use-designated-initializers>`, "Yes"
# |      :doc:`modernize-use-emplace <modernize/use-emplace>`, "Yes"
# | -    :doc:`modernize-use-equals-default <modernize/use-equals-default>`, 
"Yes"
# |      :doc:`modernize-use-equals-delete <modernize/use-equals-delete>`, "Yes"
# |      :doc:`modernize-use-integer-sign-comparison 
<modernize/use-integer-sign-comparison>`, "Yes"
# |      :doc:`modernize-use-nodiscard <modernize/use-nodiscard>`, "Yes"
# | --- 316,323 ----
# |      :doc:`modernize-use-constraints <modernize/use-constraints>`, "Yes"
# |      :doc:`modernize-use-default-member-init 
<modernize/use-default-member-init>`, "Yes"
# |      :doc:`modernize-use-designated-initializers 
<modernize/use-designated-initializers>`, "Yes"
# | +    :doc:`modernize-use-equals-default <modernize/use-equals-default>`, 
"Yes"
# |      :doc:`modernize-use-emplace <modernize/use-emplace>`, "Yes"
# |      :doc:`modernize-use-equals-delete <modernize/use-equals-delete>`, "Yes"
```

We need to invert the diff, so the user can correctly follow its
recommendations.

Added: 
    

Modified: 
    clang-tools-extra/test/clang-tidy/infrastructure/alphabetical-order.test

Removed: 
    


################################################################################
diff  --git 
a/clang-tools-extra/test/clang-tidy/infrastructure/alphabetical-order.test 
b/clang-tools-extra/test/clang-tidy/infrastructure/alphabetical-order.test
index 1a75c12f909fd..6cb0da7322f4f 100644
--- a/clang-tools-extra/test/clang-tidy/infrastructure/alphabetical-order.test
+++ b/clang-tools-extra/test/clang-tidy/infrastructure/alphabetical-order.test
@@ -1,5 +1,5 @@
 // RUN: %python %S/../../../clang-tidy/tool/check_alphabetical_order.py -o 
%t.clang-tidy-checks-list.rst
-// RUN: 
diff  --strip-trailing-cr %t.clang-tidy-checks-list.rst 
%S/../../../docs/clang-tidy/checks/list.rst
+// RUN: 
diff  --strip-trailing-cr %S/../../../docs/clang-tidy/checks/list.rst 
%t.clang-tidy-checks-list.rst
 
 // RUN: %python %S/../../../clang-tidy/tool/check_alphabetical_order.py -o 
%t.ReleaseNotes.rst
-// RUN: 
diff  --strip-trailing-cr %t.ReleaseNotes.rst %S/../../../docs/ReleaseNotes.rst
+// RUN: 
diff  --strip-trailing-cr %S/../../../docs/ReleaseNotes.rst %t.ReleaseNotes.rst


        
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