fix some tidy complaints

Author: nikomatsakis

src/librustc_mir/build/matches/simplify.rs

@@ -56,13 +56,14 @@ impl<'a,'tcx> Builder<'a,'tcx> {
 
     /// Tries to simplify `match_pair`, returning true if
     /// successful. If successful, new match pairs and bindings will
-    /// have been pushed into the candidate. On failure (if false is
-    /// returned), no changes are made to candidate.
+    /// have been pushed into the candidate. If no simplification is
+    /// possible, Err is returned and no changes are made to
+    /// candidate.
     fn simplify_match_pair(&mut self,
                            mut block: BasicBlock,
                            match_pair: MatchPair<'tcx>,
                            candidate: &mut Candidate<'tcx>)
-                           -> Result<BasicBlock, MatchPair<'tcx>> // returns Err() if cannot simplify
+                           -> Result<BasicBlock, MatchPair<'tcx>>
     {
         match match_pair.pattern.kind {
             PatternKind::Wild(..) => {

src/librustc_mir/build/matches/util.rs

@@ -27,7 +27,8 @@ impl<'a,'tcx> Builder<'a,'tcx> {
                    .collect()
     }
 
-    pub fn match_pair(&mut self, lvalue: Lvalue<'tcx>, pattern: PatternRef<'tcx>) -> MatchPair<'tcx> {
+    pub fn match_pair(&mut self, lvalue: Lvalue<'tcx>, pattern: PatternRef<'tcx>)
+                      -> MatchPair<'tcx> {
         let pattern = self.hir.mirror(pattern);
         MatchPair::new(lvalue, pattern)
     }

src/librustc_mir/hair.rs

@@ -199,7 +199,9 @@ pub enum PatternKind<'tcx> {
               subpattern: Option<PatternRef<'tcx>> },
 
     // Foo(...) or Foo{...} or Foo, where `Foo` is a variant name from an adt with >1 variants
-    Variant { adt_def: AdtDef<'tcx>, variant_index: usize, subpatterns: Vec<FieldPatternRef<'tcx>> },
+    Variant { adt_def: AdtDef<'tcx>,
+              variant_index: usize,
+              subpatterns: Vec<FieldPatternRef<'tcx>> },
 
     // (...), Foo(...), Foo{...}, or Foo, where `Foo` is a variant name from an adt with 1 variant
     Leaf { subpatterns: Vec<FieldPatternRef<'tcx>> },