Replace --show-output with --nocapture

The former does not show any output before the test is finished, which prevents long-running/stuck tests from showing any useful information.

crates/rust-analyzer/src/config.rs

@@ -895,7 +895,7 @@ config_data! {
         /// [custom test harness](https://doc.rust-lang.org/cargo/reference/cargo-targets.html#the-harness-field),
         /// they will end up being interpreted as options to
         /// [`rustc`’s built-in test harness (“libtest”)](https://doc.rust-lang.org/rustc/tests/index.html#cli-arguments).
-        runnables_extraTestBinaryArgs: Vec<String> = vec!["--show-output".to_owned()],
+        runnables_extraTestBinaryArgs: Vec<String> = vec!["--nocapture".to_owned()],
 
         /// Path to the Cargo.toml of the rust compiler workspace, for usage in rustc_private
         /// projects, or "discover" to try to automatically find it if the `rustc-dev` component

crates/rust-analyzer/tests/slow-tests/main.rs

@@ -256,7 +256,7 @@ fn main() {}
           {
             "args": {
               "cargoArgs": ["test", "--package", "foo", "--test", "spam"],
-              "executableArgs": ["test_eggs", "--exact", "--show-output"],
+              "executableArgs": ["test_eggs", "--exact", "--nocapture"],
               "overrideCargo": null,
               "cwd": server.path().join("foo"),
               "workspaceRoot": server.path().join("foo")
@@ -289,7 +289,7 @@ fn main() {}
               ],
               "executableArgs": [
                 "",
-                "--show-output"
+                "--nocapture"
               ]
             },
             "kind": "cargo",

docs/book/src/configuration_generated.md

@@ -1323,7 +1323,7 @@ tests or binaries. For example, it may be `--release`.
 Default:
 ```json
 [
-  "--show-output"
+  "--nocapture"
 ]
 ```
 

editors/code/package.json

@@ -2789,7 +2789,7 @@
                     "rust-analyzer.runnables.extraTestBinaryArgs": {
                         "markdownDescription": "Additional arguments to be passed through Cargo to launched tests, benchmarks, or\ndoc-tests.\n\nUnless the launched target uses a\n[custom test harness](https://doc.rust-lang.org/cargo/reference/cargo-targets.html#the-harness-field),\nthey will end up being interpreted as options to\n[`rustc`’s built-in test harness (“libtest”)](https://doc.rust-lang.org/rustc/tests/index.html#cli-arguments).",
                         "default": [
-                            "--show-output"
+                            "--nocapture"
                         ],
                         "type": "array",
                         "items": {