Fix test failures

src/test/compile-fail/macro-context.rs

@@ -20,14 +20,14 @@
                             //~| ERROR macro expansion ignores token `i`
 }
 
-m!();               //~ NOTE the usage of `m!` is likely invalid in this item context
+m!();               //~ NOTE the usage of `m!` is likely invalid in item context
 
 fn main() {
-    let a: m!();    //~ NOTE the usage of `m!` is likely invalid in this type context
-    let i = m!();   //~ NOTE the usage of `m!` is likely invalid in this expression context
+    let a: m!();    //~ NOTE the usage of `m!` is likely invalid in type context
+    let i = m!();   //~ NOTE the usage of `m!` is likely invalid in expression context
     match 0 {
-        m!() => {}  //~ NOTE the usage of `m!` is likely invalid in this pattern context
+        m!() => {}  //~ NOTE the usage of `m!` is likely invalid in pattern context
     }
 
-    m!();           //~ NOTE the usage of `m!` is likely invalid in this statement context
+    m!();           //~ NOTE the usage of `m!` is likely invalid in statement context
 }