rustdoc: bless improved output

Author: lolbinarycat

tests/rustdoc-ui/intra-doc/warning.stderr

@@ -69,19 +69,29 @@ LL | bar [BarC] bar
    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
 
 warning: unresolved link to `BarD`
-  --> $DIR/warning.rs:45:20
+  --> $DIR/warning.rs:45:9
    |
 LL | #[doc = "Foo\nbar [BarD] bar\nbaz"]
-   |                    ^^^^ no item named `BarD` in scope
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
+   = note: the link appears in this line:
+           
+           bar [BarD] bar
+                ^^^^
+   = note: no item named `BarD` in scope
    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
 
 warning: unresolved link to `BarF`
-  --> $DIR/warning.rs:54:15
+  --> $DIR/warning.rs:54:4
    |
 LL | f!("Foo\nbar [BarF] bar\nbaz");
-   |               ^^^^ no item named `BarF` in scope
+   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
+   = note: the link appears in this line:
+           
+           bar [BarF] bar
+                ^^^^
+   = note: no item named `BarF` in scope
    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
    = note: this warning originates in the macro `f` (in Nightly builds, run with -Z macro-backtrace for more info)
 
@@ -102,19 +112,29 @@ LL |  * time to introduce a link [error]
    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
 
 warning: unresolved link to `error`
-  --> $DIR/warning.rs:68:23
+  --> $DIR/warning.rs:68:9
    |
 LL | #[doc = "single line [error]"]
-   |                       ^^^^^ no item named `error` in scope
+   |         ^^^^^^^^^^^^^^^^^^^^^
    |
+   = note: the link appears in this line:
+           
+           single line [error]
+                        ^^^^^
+   = note: no item named `error` in scope
    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
 
 warning: unresolved link to `error`
-  --> $DIR/warning.rs:71:41
+  --> $DIR/warning.rs:71:9
    |
 LL | #[doc = "single line with \"escaping\" [error]"]
-   |                                         ^^^^^ no item named `error` in scope
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
+   = note: the link appears in this line:
+           
+           single line with "escaping" [error]
+                                        ^^^^^
+   = note: no item named `error` in scope
    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
 
 warning: unresolved link to `error`