add non-regression test to existing attributes

when `normalize_doc_attributes` is on, they shouldn't be affected

tests/source/doc-attrib.rs

@@ -23,3 +23,53 @@ fn g() {
         }
     }
 }
+
+// non-regression test for regular attributes, from #2647
+#[cfg(feature = "this_line_is_101_characters_long_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")]
+pub fn foo() {}
+
+// path attrs
+#[clippy::bar]
+#[clippy::bar=foo]
+#[clippy::bar(a, b, c)]
+pub fn foo() {}
+
+mod issue_2620 {
+    #[derive(Debug, StructOpt)]
+#[structopt(about = "Display information about the character on FF Logs")]
+pub struct Params {
+  #[structopt(help = "The server the character is on")]
+  server: String,
+  #[structopt(help = "The character's first name")]
+  first_name: String,
+  #[structopt(help = "The character's last name")]
+  last_name: String,
+  #[structopt(
+    short = "j",
+    long = "job",
+    help = "The job to look at",
+    parse(try_from_str)
+  )]
+  job: Option<Job>
+}
+}
+
+// non-regression test for regular attributes, from #2969
+#[cfg(not(all(feature="std",
+              any(target_os = "linux", target_os = "android",
+                  target_os = "netbsd",
+                  target_os = "dragonfly",
+                  target_os = "haiku",
+                  target_os = "emscripten",
+                  target_os = "solaris",
+                  target_os = "cloudabi",
+                  target_os = "macos", target_os = "ios",
+                  target_os = "freebsd",
+                  target_os = "openbsd", target_os = "bitrig",
+                  target_os = "redox",
+                  target_os = "fuchsia",
+                  windows,
+                  all(target_arch = "wasm32", feature = "stdweb"),
+                  all(target_arch = "wasm32", feature = "wasm-bindgen"),
+              ))))]
+type Os = NoSource;

tests/target/doc-attrib.rs

@@ -27,3 +27,61 @@ fn g() {}
         }
     }
 }
+
+// non-regression test for regular attributes, from #2647
+#[cfg(
+    feature = "this_line_is_101_characters_long_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+)]
+pub fn foo() {}
+
+// path attrs
+#[clippy::bar]
+#[clippy::bar=foo]
+#[clippy::bar(a, b, c)]
+pub fn foo() {}
+
+mod issue_2620 {
+    #[derive(Debug, StructOpt)]
+    #[structopt(about = "Display information about the character on FF Logs")]
+    pub struct Params {
+        #[structopt(help = "The server the character is on")]
+        server: String,
+        #[structopt(help = "The character's first name")]
+        first_name: String,
+        #[structopt(help = "The character's last name")]
+        last_name: String,
+        #[structopt(
+            short = "j",
+            long = "job",
+            help = "The job to look at",
+            parse(try_from_str)
+        )]
+        job: Option<Job>,
+    }
+}
+
+// non-regression test for regular attributes, from #2969
+#[cfg(not(all(
+    feature = "std",
+    any(
+        target_os = "linux",
+        target_os = "android",
+        target_os = "netbsd",
+        target_os = "dragonfly",
+        target_os = "haiku",
+        target_os = "emscripten",
+        target_os = "solaris",
+        target_os = "cloudabi",
+        target_os = "macos",
+        target_os = "ios",
+        target_os = "freebsd",
+        target_os = "openbsd",
+        target_os = "bitrig",
+        target_os = "redox",
+        target_os = "fuchsia",
+        windows,
+        all(target_arch = "wasm32", feature = "stdweb"),
+        all(target_arch = "wasm32", feature = "wasm-bindgen"),
+    )
+)))]
+type Os = NoSource;