git log -L:<funcname>:<file> bug report

[Robin Vagner <robin.vagner@unit-image.fr>]

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Hello, this is my first time reporting an issue through mail, so I am
sorry if I missed something.
The file generated with `git bugreport` is attached to this mail, and
I also copy-pasted its contents below just in case.

Tell me if you need more precisions, I feel like this is a bug, but it
might just be an absence of feature.

Thanks in advance,

Robin Vagner.

---

Thank you for filling out a Git bug report!
Please answer the following questions to help us understand your issue.

What did you do before the bug happened? (Steps to reproduce your issue)
> Use the command `git log -L:<funcname>:<file>` on a python file, with an existing function name in an existing file.

What did you expect to happen? (Expected behavior)
> The git log function to find the given function name and display its history.

What happened instead? (Actual behavior)
> I got this error : `fatal: -L parameter 'get_comment_from_args' starting at line 1: no match`

What's different between what you expected and what actually happened?
> Since git already knows by default to use python for diffs with *.py files, I expected it to find the function.

Anything else you want to add:
> It works properly if I add a .gitattributes file with the following line : `*.py diff=python`, which is weird because I thought this was already the default values for git (at least a `git diff` shows me the function name properly in the diff blobs.

Please review the rest of the bug report below.
You can delete any lines you don't wish to share.


[System Info]
git version:
git version 2.35.1.windows.2
cpu: x86_64
built from commit: 5437f0fd368c7faf1a0b5e1fef048232c1f2a3e6
sizeof-long: 4
sizeof-size_t: 8
shell-path: /bin/sh
feature: fsmonitor--daemon
uname: Windows 10.0 19043
compiler info: gnuc: 11.2
libc info: no libc information available
$SHELL (typically, interactive shell): <unset>


[Enabled Hooks]

[-- Attachment #2: git-bugreport-2023-03-22-1040.txt --]
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Thank you for filling out a Git bug report!
Please answer the following questions to help us understand your issue.

What did you do before the bug happened? (Steps to reproduce your issue)
> Use the command `git log -L:<funcname>:<file>` on a python file, with an existing function name in an existing file.

What did you expect to happen? (Expected behavior)
> The git log function to find the given function name and display its history.

What happened instead? (Actual behavior)
> I got this error : `fatal: -L parameter 'get_comment_from_args' starting at line 1: no match`

What's different between what you expected and what actually happened?
> Since git already knows by default to use python for diffs with *.py files, I expected it to find the function.

Anything else you want to add:
> It works properly if I add a .gitattributes file with the following line : `*.py diff=python`, which is weird because I thought this was already the default values for git (at least a `git diff` shows me the function name properly in the diff blobs.

Please review the rest of the bug report below.
You can delete any lines you don't wish to share.


[System Info]
git version:
git version 2.35.1.windows.2
cpu: x86_64
built from commit: 5437f0fd368c7faf1a0b5e1fef048232c1f2a3e6
sizeof-long: 4
sizeof-size_t: 8
shell-path: /bin/sh
feature: fsmonitor--daemon
uname: Windows 10.0 19043 
compiler info: gnuc: 11.2
libc info: no libc information available
$SHELL (typically, interactive shell): <unset>


[Enabled Hooks]