Fix spacing when testing individual crates

Author: Kobzol

src/bootstrap/src/core/builder/mod.rs

@@ -291,7 +291,7 @@ pub fn crate_description(crates: &[impl AsRef<str>]) -> String {
         return "".into();
     }
 
-    let mut descr = String::from(" {");
+    let mut descr = String::from("{");
     descr.push_str(crates[0].as_ref());
     for krate in &crates[1..] {
         descr.push_str(", ");

src/bootstrap/src/core/builder/tests.rs

@@ -1878,9 +1878,10 @@ mod snapshot {
         [test] CoverageRunRustdoc <host>
         [test] Pretty <host>
         [build] rustc 1 <host> -> std 1 <host>
+        [build] rustc 0 <host> -> std 0 <host>
+        [build] rustdoc 0 <host>
         [test] CrateLibrustc <host>
         [build] rustc 1 <host> -> rustc 2 <host>
-        [build] rustdoc 0 <host>
         [test] crate-bootstrap <host> src/tools/coverage-dump
         [test] crate-bootstrap <host> src/tools/jsondoclint
         [test] crate-bootstrap <host> src/tools/replace-version-placeholder
@@ -1915,7 +1916,7 @@ mod snapshot {
         [doc] rustc (book) <host>
         [test] rustc 1 <host> -> lint-docs 2 <host>
         [doc] rustc 1 <host> -> std 1 <host> crates=[]
-        [test] rustc 1 <host> -> rustdoc-js-std 2 <host>
+        [test] rustdoc-js-std 1 <host>
         [build] rustc 0 <host> -> RustdocTheme 1 <host>
         [test] rustdoc-theme 1 <host>
         [test] RustdocUi <host>

src/bootstrap/src/lib.rs

@@ -1130,14 +1130,18 @@ impl Build {
         };
 
         let action = action.into().description();
-        let msg = |fmt| format!("{action} stage{actual_stage} {what}{fmt}");
+        let what = what.to_string();
+        let msg = |fmt| {
+            let space = if !what.is_empty() { " " } else { "" };
+            format!("{action} stage{actual_stage} {what}{space}{fmt}")
+        };
         let msg = if let Some(target) = target.into() {
             let build_stage = host_and_stage.stage;
             let host = host_and_stage.host;
             if host == target {
-                msg(format_args!(" (stage{build_stage} -> stage{actual_stage}, {target})"))
+                msg(format_args!("(stage{build_stage} -> stage{actual_stage}, {target})"))
             } else {
-                msg(format_args!(" (stage{build_stage}:{host} -> stage{actual_stage}:{target})"))
+                msg(format_args!("(stage{build_stage}:{host} -> stage{actual_stage}:{target})"))
             }
         } else {
             msg(format_args!(""))