Rust: Accept changes to the dataflow/sources/file test.

Author: geoffw0

rust/ql/test/library-tests/dataflow/sources/file/TaintSources.expected

@@ -4,8 +4,10 @@
 | test.rs:17:31:17:38 | ...::read | Flow source 'FileSource' of type file (DEFAULT). |
 | test.rs:22:22:22:39 | ...::read_to_string | Flow source 'FileSource' of type file (DEFAULT). |
 | test.rs:22:22:22:39 | ...::read_to_string | Flow source 'FileSource' of type file (DEFAULT). |
+| test.rs:26:18:26:29 | ...::read_dir | Flow source 'FileSource' of type file (DEFAULT). |
 | test.rs:29:22:29:25 | path | Flow source 'FileSource' of type file (DEFAULT). |
 | test.rs:43:27:43:35 | file_name | Flow source 'FileSource' of type file (DEFAULT). |
+| test.rs:51:52:51:59 | read_dir | Flow source 'FileSource' of type file (DEFAULT). |
 | test.rs:54:22:54:25 | path | Flow source 'FileSource' of type file (DEFAULT). |
 | test.rs:55:27:55:35 | file_name | Flow source 'FileSource' of type file (DEFAULT). |
 | test.rs:65:22:65:34 | ...::read_link | Flow source 'FileSource' of type file (DEFAULT). |

rust/ql/test/library-tests/dataflow/sources/file/test.rs

@@ -23,7 +23,7 @@ fn test_fs() -> Result<(), Box<dyn std::error::Error>> {
         sink(buffer); // $ hasTaintFlow="file.txt"
     }
 
-    for entry in fs::read_dir("directory")? {
+    for entry in fs::read_dir("directory")? { // $ Alert[rust/summary/taint-sources]
         let e = entry?;
 
         let path = e.path(); // $ Alert[rust/summary/taint-sources]
@@ -48,7 +48,7 @@ fn test_fs() -> Result<(), Box<dyn std::error::Error>> {
         sink(file_name.clone().as_encoded_bytes()); // $ MISSING: hasTaintFlow
         sink(file_name); // $ hasTaintFlow
     }
-    for entry in std::path::Path::new("directory").read_dir()? {
+    for entry in std::path::Path::new("directory").read_dir()? { // $ Alert[rust/summary/taint-sources]
         let e = entry?;
 
         let path = e.path(); // $ Alert[rust/summary/taint-sources]