index (i.e. amount of addition/deletions compared to the
file's size). For example, `-M90%` means git should consider a
delete/add pair to be a rename if more than 90% of the file
- hasn't changed.
+ hasn't changed. Without a `%` sign, the number is to be read as
+ a fraction, with a decimal point before it. I.e., `-M5` becomes
+ 0.5, and is thus the same as `-M50%`. Similarly, `-M05` is
+ the same as `-M5%`. To limit detection to exact renames, use
+ `-M100%`.
-C[<n>]::
--find-copies[=<n>]::