Fix a typo when reporting what's fixed

Author: alexcrichton

cargo-fix/src/main.rs

@@ -207,7 +207,7 @@ fn rustfix_crate(rustc: &Path, filename: &str) -> Result<HashMap<String, String>
         let num_suggestions = suggestions.len();
         debug!("applying {} fixes to {}", num_suggestions, file);
 
-        diagnostics::Message::fixing(&file, num_suggestion).post()?;
+        diagnostics::Message::fixing(&file, num_suggestions).post()?;
 
         let new_code = rustfix::apply_suggestions(&code, &suggestions)?;
         File::create(&file)

cargo-fix/tests/all/smoke.rs

@@ -143,3 +143,36 @@ fn fix_deny_warnings_but_not_others() {
     assert!(!p.read("src/lib.rs").contains("let mut x = 3;"));
     assert!(p.read("src/lib.rs").contains("fn bar() {}"));
 }
+
+#[test]
+fn fix_two_files() {
+    let p = project()
+        .file(
+            "src/lib.rs",
+            "
+                pub mod bar;
+
+                pub fn foo() -> u32 {
+                    let mut x = 3;
+                    x
+                }
+            ",
+        )
+        .file(
+            "src/bar.rs",
+            "
+                pub fn foo() -> u32 {
+                    let mut x = 3;
+                    x
+                }
+            ",
+        )
+        .build();
+
+    p.expect_cmd("cargo-fix fix")
+        .stderr_contains("[FIXING] src/bar.rs (1 fix)")
+        .stderr_contains("[FIXING] src/lib.rs (1 fix)")
+        .run();
+    assert!(!p.read("src/lib.rs").contains("let mut x = 3;"));
+    assert!(!p.read("src/bar.rs").contains("let mut x = 3;"));
+}