Make the javadoc a little bit more precise.

RELNOTES: None
PiperOrigin-RevId: 315247255

src/main/java/com/google/devtools/build/lib/vfs/Path.java

diff --git a/src/main/java/com/google/devtools/build/lib/vfs/Path.java b/src/main/java/com/google/devtools/build/lib/vfs/Path.java
index c12818b..58bb000 100644
--- a/src/main/java/com/google/devtools/build/lib/vfs/Path.java
+++ b/src/main/java/com/google/devtools/build/lib/vfs/Path.java
@@ -666,7 +666,8 @@
   /**
    * Deletes the file denoted by this path, not following symbolic links. Returns normally iff the
    * file doesn't exist after the call: true if this call deleted the file, false if the file
-   * already didn't exist. Throws an exception if the file could not be deleted for any reason.
+   * already didn't exist. Throws an exception if the file could not be deleted but was present
+   * prior to this call.
    *
    * @return true iff the file was actually deleted by this call
    * @throws IOException if the deletion failed but the file was present prior to the call