Add note about stricter checks for invalid input

README.md

@@ -4,6 +4,8 @@ A Go library for parsing and applying patches generated by `git diff`, `git
 show`, and `git format-patch`. It can also parse and apply unified diffs
 generated by the standard `diff` tool.
 
+It supports both standard line-oriented / text patches and Git binary patches.
+
 ## Status
 
 In development, most functionality is currently missing, incomplete, or broken.
@@ -20,12 +22,19 @@ In development, most functionality is currently missing, incomplete, or broken.
 2. Most other packages only parse patches, so you need another package to apply
    them (and if they do support applies, it is only for text files.)
 
-3. This package aims to accept anything that `git apply` accepts, and closely
-   follows the logic in [`apply.c`](https://github.com/git/git/blob/master/apply.c).
+3. This package aims to accept anything<sup id="a1">[1](#f1)</sup> that `git
+   apply` accepts, and closely follows the logic in [`apply.c`][apply.c].
 
 4. It seemed like a fun thing to write and a good way to learn more about Git.
 
+<b id="f1">1:</b> In practice this library is stricter than `git apply` when
+given certain types of invalid input, particularly lines that contain garbage
+following the valid content. Git seems to ignore this, while this library will
+usually return an error. [↩](#a1)
+
 [sourcegraph]: https://github.com/sourcegraph/go-diff
 [sergi]: https://github.com/sergi/go-diff
 [waigani]: https://github.com/waigani/diffparser
 [seletskiy]: https://github.com/seletskiy/godiff
+
+[apply.c]: https://github.com/git/git/blob/master/apply.c