typing: explicitly set the return type of `_InnerRevLog.raw_text()`
Somewhere between
cd72a88c5599 and
2fd44b3dcc33, pytype changed the return type
from `Tuple[_T1, Any, bool]` to `Any`. Both are wrong. `mdiff.patches()` is an
alias for `mpatch.patches()`, which is selected via module policy (and breaks
the ability to infer the types). However, `cext`, `cffi`, and `pure`
implementations all agree it returns bytes.
$ hg init repo
$ cd repo
$ echo a > a
$ hg ci -Am t
adding a
$ hg mv a b
$ hg ci -Am t1
$ hg debugrename b
b renamed from a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3
$ hg mv b a
$ hg ci -Am t2
$ hg debugrename a
a renamed from b:37d9b5d994eab34eda9c16b195ace52c7b129980
$ hg debugrename --rev 1 b
b renamed from a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3