os: clarify docs for Rename.
Three changes:
1. mention "move" to clarify things up.
2. use {old,new}path instead of {old,new}name, which makes it clear what
relative path would do here.
3. mention "OS-specific restrictions might apply".
Fixes #6887.
R=golang-dev, alex.brainman, iant, r
CC=golang-dev
https://golang.org/cl/36930044
diff --git a/src/pkg/os/file.go b/src/pkg/os/file.go
index 2dd1fcf..18cd61d 100644
--- a/src/pkg/os/file.go
+++ b/src/pkg/os/file.go
@@ -140,6 +140,9 @@
if n < 0 {
n = 0
}
+ if n != len(b) {
+ err = io.ErrShortWrite
+ }
epipecheck(f, e)
