Combine redundant match arm bodies.

lib/filecheck/src/error.rs

@@ -39,9 +39,9 @@ impl StdError for Error {
     fn description(&self) -> &str {
         use Error::*;
         match *self {
-            Syntax(ref s) => s,
-            UndefVariable(ref s) => s,
-            Backref(ref s) => s,
+            Syntax(ref s) |
+            UndefVariable(ref s) |
+            Backref(ref s) |
             DuplicateDef(ref s) => s,
             Regex(ref err) => err.description(),
         }

lib/filecheck/src/pattern.rs

@@ -45,7 +45,7 @@ impl Part {
     /// Get the variabled referenced by this part, if any.
     pub fn ref_var(&self) -> Option<&str> {
         match *self {
-            Part::Var(ref var) => Some(var),
+            Part::Var(ref var) |
             Part::DefVar { ref var, .. } => Some(var),
             _ => None,
         }