Merge pull request #252 from zserik/issue251

with rustc 1.27.0 (and probably 1.28.0, too), which doesn't apply the (#allow) unknown_lints, renamed_and_removed_lints to unused_doc_comment, unused_doc_comments, when these lints-to-ignore are in the same line

Author: AndyGauge

src/error_chain.rs

@@ -12,7 +12,8 @@ macro_rules! impl_error_chain_cause_or_source {
                $( #[$meta_foreign_links:meta] )*; )*
         }
     ) => {
-        #[allow(unknown_lints, renamed_and_removed_lints, unused_doc_comment, unused_doc_comments)]
+        #[allow(unknown_lints, renamed_and_removed_lints)]
+        #[allow(unused_doc_comment, unused_doc_comments)]
         fn cause(&self) -> Option<&::std::error::Error> {
             match self.1.next_error {
                 Some(ref c) => Some(&**c),
@@ -46,8 +47,8 @@ macro_rules! impl_error_chain_cause_or_source {
                $( #[$meta_foreign_links:meta] )*; )*
         }
     ) => {
-
-            #[allow(unknown_lints, renamed_and_removed_lints, unused_doc_comment, unused_doc_comments)]
+            #[allow(unknown_lints, renamed_and_removed_lints)]
+            #[allow(unused_doc_comment, unused_doc_comments)]
             fn source(&self) -> Option<&(std::error::Error + 'static)> {
                 match self.1.next_error {
                     Some(ref c) => Some(&**c),
@@ -521,7 +522,8 @@ macro_rules! impl_extract_backtrace {
     ($error_name: ident
      $error_kind_name: ident
      $([$link_error_path: path, $(#[$meta_links: meta])*])*) => {
-        #[allow(unknown_lints, renamed_and_removed_lints, unused_doc_comment, unused_doc_comments)]
+        #[allow(unknown_lints, renamed_and_removed_lints)]
+        #[allow(unused_doc_comment, unused_doc_comments)]
         fn extract_backtrace(e: &(::std::error::Error + Send + 'static))
             -> Option<$crate::InternalBacktrace> {
             if let Some(e) = e.downcast_ref::<$error_name>() {

src/impl_error_chain_kind.rs

@@ -12,7 +12,7 @@ macro_rules! stringify_internal {
     ($($t:tt)*) => { stringify!($($t)*) }
 }
 
-/// Macro used interally for output expanding an expression 
+/// Macro used interally for output expanding an expression
 #[macro_export]
 macro_rules! write_internal {
     ($dst:expr, $($arg:tt)*) => (write!($dst, $($arg)*))
@@ -239,7 +239,8 @@ macro_rules! impl_error_chain_kind {
             $item:ident: $imode:tt [$(#[$imeta:meta])*] [$( $var:ident: $typ:ty ),*] {$( $funcs:tt )*}
         )*}
     ) => {
-        #[allow(unknown_lints, unused, renamed_and_removed_lints, unused_doc_comment, unused_doc_comments)]
+        #[allow(unknown_lints, unused, renamed_and_removed_lints)]
+        #[allow(unused_doc_comment, unused_doc_comments)]
         impl ::std::fmt::Display for $name {
             fn fmt(&self, fmt: &mut ::std::fmt::Formatter)
                 -> ::std::fmt::Result
@@ -262,7 +263,8 @@ macro_rules! impl_error_chain_kind {
                 }
             }
         }
-        #[allow(unknown_lints, unused, renamed_and_removed_lints, unused_doc_comment, unused_doc_comments)]
+        #[allow(unknown_lints, unused, renamed_and_removed_lints)]
+        #[allow(unused_doc_comment, unused_doc_comments)]
         impl $name {
             /// A string describing the error kind.
             pub fn description(&self) -> &str {