Auto merge of #48955 - kennytm:rollup, r=kennytm

Rollup of 13 pull requests

- Successful merges: #48201, #48705, #48725, #48824, #48877, #48880, #48887, #48928, #48934, #48480, #48631, #48898, #48954
- Failed merges:

1 files changed, 4 insertions, 0 deletions

diff --git a/src/libstd/fs.rs b/src/libstd/fs.rs
index 292a78278ab..db52ed67d3a 100644
--- a/src/libstd/fs.rs
+++ b/src/libstd/fs.rs
@@ -453,6 +453,10 @@ impl File {
     /// will be extended to `size` and have all of the intermediate data filled
     /// in with 0s.
     ///
+    /// The file's cursor isn't changed. In particular, if the cursor was at the
+    /// end and the file is shrunk using this operation, the cursor will now be
+    /// past the end.
+    ///
     /// # Errors
     ///
     /// This function will return an error if the file is not opened for writing.