Rename tests from `*.spire` to `*.slang`

Many of the existing test cases were being skipped on accident, because their file names used `.spire` and the test tool was now looking for `.slang`

1 files changed, 6 insertions, 0 deletions

diff --git a/tests/diagnostics/function-redefinition.slang.expected b/tests/diagnostics/function-redefinition.slang.expected
new file mode 100644
index 000000000..ff96cf5ea
--- /dev/null
+++ b/tests/diagnostics/function-redefinition.slang.expected
@@ -0,0 +1,6 @@
+result code = -1
+standard error = {
+tests/diagnostics/function-redefinition.slang(5): error 30001: 'foo(int)': function redefinition.
+}
+standard output = {
+}