Add more test cases

Author: notriddle

tests/ui/doc_suspicious_footnotes.fixed

@@ -38,6 +38,7 @@ pub fn footnotes() {
 }
 
 pub struct Foo;
+#[rustfmt::skip]
 impl Foo {
     #[doc = r#"[^2]: hello world
 
@@ -90,6 +91,13 @@ This is not a footnote[^either], but it doesn't warn.
     pub fn footnotes3() {
         // test code goes here
     }
+    #[doc = "My footnote [^foot\note]"]
+    pub fn footnote4() {
+        // test code goes here
+    }
+    #[doc = "Hihi"]pub fn footnote5() {
+        // test code goes here
+    }
 }
 
 #[doc = r#"[^2]: hello world

tests/ui/doc_suspicious_footnotes.rs

@@ -34,6 +34,7 @@ pub fn footnotes() {
 }
 
 pub struct Foo;
+#[rustfmt::skip]
 impl Foo {
     #[doc = r#"This is not a footnote[^1]."#]
     //~^ doc_suspicious_footnotes
@@ -78,6 +79,13 @@ impl Foo {
     pub fn footnotes3() {
         // test code goes here
     }
+    #[doc = "My footnote [^foot\note]"]
+    pub fn footnote4() {
+        // test code goes here
+    }
+    #[doc = "Hihi"]pub fn footnote5() {
+        // test code goes here
+    }
 }
 
 #[doc = r"This is not a footnote[^1]."]

tests/ui/doc_suspicious_footnotes.stderr

@@ -27,7 +27,7 @@ LL + /// [^1]: <!-- description -->
    |
 
 error: looks like a footnote ref, but has no matching footnote
-  --> tests/ui/doc_suspicious_footnotes.rs:38:13
+  --> tests/ui/doc_suspicious_footnotes.rs:39:13
    |
 LL |     #[doc = r#"This is not a footnote[^1]."#]
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -40,7 +40,7 @@ LL ~ [^1]: <!-- description -->"#]
    |
 
 error: looks like a footnote ref, but has no matching footnote
-  --> tests/ui/doc_suspicious_footnotes.rs:55:13
+  --> tests/ui/doc_suspicious_footnotes.rs:56:13
    |
 LL |       #[doc = "This is not a footnote[^1].
    |  _____________^
@@ -72,7 +72,7 @@ LL ~ [^1]: <!-- description -->"#]
    |
 
 error: looks like a footnote ref, but has no matching footnote
-  --> tests/ui/doc_suspicious_footnotes.rs:75:15
+  --> tests/ui/doc_suspicious_footnotes.rs:76:15
    |
 LL |         doc = "This is not a footnote[^1].\n\nThis is not a footnote[^either], but it doesn't warn."
    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -87,7 +87,7 @@ LL + [^1]: <!-- description -->"#
    |
 
 error: looks like a footnote ref, but has no matching footnote
-  --> tests/ui/doc_suspicious_footnotes.rs:83:9
+  --> tests/ui/doc_suspicious_footnotes.rs:91:9
    |
 LL | #[doc = r"This is not a footnote[^1]."]
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -100,7 +100,7 @@ LL ~ [^1]: <!-- description -->"#]
    |
 
 error: looks like a footnote ref, but has no matching footnote
-  --> tests/ui/doc_suspicious_footnotes.rs:103:30
+  --> tests/ui/doc_suspicious_footnotes.rs:111:30
    |
 LL |      * This is not a footnote[^1].
    |                              ^^^^
@@ -112,7 +112,7 @@ LL + /*! [^1]: <!-- description --> */
    |
 
 error: looks like a footnote ref, but has no matching footnote
-  --> tests/ui/doc_suspicious_footnotes.rs:114:30
+  --> tests/ui/doc_suspicious_footnotes.rs:122:30
    |
 LL |      * This is not a footnote[^1].
    |                              ^^^^