Fix inconsistent test name

Author: Y-Nak

tests/ui/doc_panics.rs renamed to tests/ui/missing_panics_doc.rs

@@ -1,5 +1,5 @@
 error: docs for function which may panic missing `# Panics` section
-  --> $DIR/doc_panics.rs:7:1
+  --> $DIR/missing_panics_doc.rs:7:1
    |
 LL | / pub fn unwrap() {
 LL | |     let result = Err("Hi");
@@ -9,43 +9,43 @@ LL | | }
    |
    = note: `-D clippy::missing-panics-doc` implied by `-D warnings`
 note: first possible panic found here
-  --> $DIR/doc_panics.rs:9:5
+  --> $DIR/missing_panics_doc.rs:9:5
    |
 LL |     result.unwrap()
    |     ^^^^^^^^^^^^^^^
 
 error: docs for function which may panic missing `# Panics` section
-  --> $DIR/doc_panics.rs:13:1
+  --> $DIR/missing_panics_doc.rs:13:1
    |
 LL | / pub fn panic() {
 LL | |     panic!("This function panics")
 LL | | }
    | |_^
    |
 note: first possible panic found here
-  --> $DIR/doc_panics.rs:14:5
+  --> $DIR/missing_panics_doc.rs:14:5
    |
 LL |     panic!("This function panics")
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: docs for function which may panic missing `# Panics` section
-  --> $DIR/doc_panics.rs:18:1
+  --> $DIR/missing_panics_doc.rs:18:1
    |
 LL | / pub fn todo() {
 LL | |     todo!()
 LL | | }
    | |_^
    |
 note: first possible panic found here
-  --> $DIR/doc_panics.rs:19:5
+  --> $DIR/missing_panics_doc.rs:19:5
    |
 LL |     todo!()
    |     ^^^^^^^
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: docs for function which may panic missing `# Panics` section
-  --> $DIR/doc_panics.rs:23:1
+  --> $DIR/missing_panics_doc.rs:23:1
    |
 LL | / pub fn inner_body(opt: Option<u32>) {
 LL | |     opt.map(|x| {
@@ -57,22 +57,22 @@ LL | | }
    | |_^
    |
 note: first possible panic found here
-  --> $DIR/doc_panics.rs:26:13
+  --> $DIR/missing_panics_doc.rs:26:13
    |
 LL |             panic!()
    |             ^^^^^^^^
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: docs for function which may panic missing `# Panics` section
-  --> $DIR/doc_panics.rs:32:1
+  --> $DIR/missing_panics_doc.rs:32:1
    |
 LL | / pub fn unreachable_and_panic() {
 LL | |     if true { unreachable!() } else { panic!() }
 LL | | }
    | |_^
    |
 note: first possible panic found here
-  --> $DIR/doc_panics.rs:33:39
+  --> $DIR/missing_panics_doc.rs:33:39
    |
 LL |     if true { unreachable!() } else { panic!() }
    |                                       ^^^^^^^^