Use the correct file/line for doctests on both inner and outer attributes

src/test/rustdoc-ui/issue-79764/a/another_mod.rs

@@ -0,0 +1,4 @@
+//! ```
+//! // ^ a/another_mod.rs line 1
+//! assert_eq!(1, 1);
+//! ```

src/test/rustdoc-ui/issue-79764/a/mod.rs

@@ -0,0 +1,10 @@
+//! ```
+//! // ^ a/mod.rs line 1
+//! assert_eq!(1, 1);
+//! ```
+
+/// ```
+/// // ^ a/mod.rs line 6
+/// assert_eq!(1, 1);
+/// ```
+pub mod another_mod;

src/test/rustdoc-ui/issue-79764/mod.rs

@@ -0,0 +1,14 @@
+// check-pass
+// compile-flags:--test
+// normalize-stdout-test: "src/test/rustdoc-ui" -> "$$DIR"
+// normalize-stdout-test "finished in \d+\.\d+s" -> "finished in $$TIME"
+
+// The literal `mod` in the doctest comments makes rustdoc emit a bogus
+// `extern crate mod;` line which would break the doctests.
+#![doc(test(no_crate_inject))]
+
+/// ```
+/// // ^ mod.rs line 10
+/// assert_eq!(1, 1);
+/// ```
+pub mod a;

src/test/rustdoc-ui/issue-79764/mod.stdout

@@ -0,0 +1,9 @@
+
+running 4 tests
+test $DIR/issue-79764/mod.rs - a (line 14) ... ok
+test $DIR/issue-79764/mod.rs - a (line 10) ... ok
+test $DIR/issue-79764/a/mod.rs - a::another_mod (line 6) ... ok
+test $DIR/issue-79764/a/mod.rs - a::another_mod (line 10) ... ok
+
+test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in $TIME
+