3 files changed, 10 insertions, 2 deletions
diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index ab62dd2bc9b..9c4945d74db 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -640,19 +640,26 @@ pub enum PatKind {
     /// If the `..` pattern fragment is present, then `Option<usize>` denotes its position.
     /// `0 <= position <= subpats.len()`.
     Tuple(Vec<P<Pat>>, Option<usize>),
+
     /// A `box` pattern.
     Box(P<Pat>),
+
     /// A reference pattern (e.g., `&mut (a, b)`).
     Ref(P<Pat>, Mutability),
+
     /// A literal.
     Lit(P<Expr>),
+
     /// A range pattern (e.g., `1...2`, `1..=2` or `1..2`).
     Range(P<Expr>, P<Expr>, Spanned<RangeEnd>),
+
     /// `[a, b, ..i, y, z]` is represented as:
     ///     `PatKind::Slice(box [a, b], Some(i), box [y, z])`
     Slice(Vec<P<Pat>>, Option<P<Pat>>, Vec<P<Pat>>),
+
     /// Parentheses in patterns used for grouping (i.e., `(PAT)`).
     Paren(P<Pat>),
+
     /// A macro pattern; pre-expansion.
     Mac(Mac),
 }
diff --git a/src/libsyntax/mut_visit.rs b/src/libsyntax/mut_visit.rs
index 1e5eb0992bd..fd7003d30a1 100644
--- a/src/libsyntax/mut_visit.rs
+++ b/src/libsyntax/mut_visit.rs
@@ -1037,7 +1037,7 @@ pub fn noop_visit_pat<T: MutVisitor>(pat: &mut P<Pat>, vis: &mut T) {
             vis.visit_expr(e1);
             vis.visit_expr(e2);
             vis.visit_span(span);
-        },
+        }
         PatKind::Slice(before, slice, after) => {
             visit_vec(before, |pat| vis.visit_pat(pat));
             visit_opt(slice, |slice| vis.visit_pat(slice));
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index e22047938e5..b1fb38d8eaf 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -4173,7 +4173,8 @@ impl<'a> Parser<'a> {
                 err.emit();
                 self.bump();
             } else if self.eat(&token::BinOp(token::Or)) {
-                // No op.
+                // This is a No-op. Continue the loop to parse the next
+                // pattern.
             } else {
                 return Ok(pats);
             }