Fix ui tests

Author: taiki-e

futures/testcrate/ui/move-captured-variable.stderr

@@ -1,13 +1,17 @@
-error[E0507]: cannot move out of captured variable in an `FnMut` closure
+error[E0507]: cannot move out of `a`, a captured variable in an `FnMut` closure
   --> $DIR/move-captured-variable.rs:10:9
    |
 8  |       let a = String::new();
    |           - captured outer variable
 9  |       foo(|| {
 10 | /         async_stream_block! {
 11 | |             yield a
+   | |                   -
+   | |                   |
+   | |                   move occurs because `a` has type `std::string::String`, which does not implement the `Copy` trait
+   | |                   move occurs due to use in generator
 12 | |         };
-   | |__________^ cannot move out of captured variable in an `FnMut` closure
+   | |__________^ move out of `a` occurs here
 
 error: aborting due to previous error
 

futures/testcrate/ui/update-all-references.sh

@@ -18,6 +18,6 @@
 #
 # See all `update-references.sh`, if you just want to update a single test.
 
-MY_DIR="$(dirname "${BASH_SOURCE[0]}")"
+MY_DIR=$(dirname $0)
 cd $MY_DIR
 find . -name '*.rs' | xargs ./update-references.sh

futures/testcrate/ui/update-references.sh

@@ -19,7 +19,7 @@
 # If you find yourself manually editing a foo.stderr file, you're
 # doing it wrong.
 
-MYDIR="$(dirname "${BASH_SOURCE[0]}")"
+MYDIR=$(dirname $0)
 
 BUILD_DIR="../target/tests/ui"