feat(blame): Support custom `rev_opts` for blame

The `git blame` CLI offers a repeated `-C` option that can be used to detect
lines that move within/between files. While a slower operation, it yields more
accurate authorship reports.
https://git-scm.com/docs/git-blame#Documentation/git-blame.txt--Cltnumgt

While GitPython does enable passing custom kwargs to the command line `git`
invocation, the fact that kwargs is a dictionary (i.e. no duplicate keys) means
that there was no way to request the `-C` option in `git blame` more than once.

This commit adds an optional `rev_opts` parameter to the `blame` method which
accepts a list of strings to propagate to the CLI invocation of `git blame`. By
using a `List[str]` for `rev_opts`, users of GitPython can pass now the `-C`
option multiple times to get more detailed authorship reports from `git blame`.

1 files changed, 8 insertions, 3 deletions

diff --git a/git/repo/base.py b/git/repo/base.py
index a1be5ff9..c49c6118 100644
--- a/git/repo/base.py
+++ b/git/repo/base.py
@@ -950,7 +950,12 @@ class Repo(object):
             )
 
     def blame(
-        self, rev: Union[str, HEAD], file: str, incremental: bool = False, **kwargs: Any
+        self,
+        rev: Union[str, HEAD],
+        file: str,
+        incremental: bool = False,
+        rev_opts: Optional[List[str]] = None,
+        **kwargs: Any
     ) -> List[List[Commit | List[str | bytes] | None]] | Iterator[BlameEntry] | None:
         """The blame information for the given file at the given revision.
 
@@ -962,8 +967,8 @@ class Repo(object):
             of appearance."""
         if incremental:
             return self.blame_incremental(rev, file, **kwargs)
-
-        data: bytes = self.git.blame(rev, "--", file, p=True, stdout_as_string=False, **kwargs)
+        rev_opts = rev_opts or []
+        data: bytes = self.git.blame(rev, *rev_opts, "--", file, p=True, stdout_as_string=False, **kwargs)
         commits: Dict[str, Commit] = {}
         blames: List[List[Commit | List[str | bytes] | None]] = []