Fixed error starting with uppercase

Error messages cleaned in librustc/middle

Error messages cleaned in libsyntax

Error messages cleaned in libsyntax more agressively

Error messages cleaned in librustc more aggressively

Fixed affected tests

Fixed other failing tests

Last failing tests fixed

src/libsyntax/ext/deriving/clone.rs

@@ -92,10 +92,10 @@ fn cs_clone(
             all_fields = af;
         },
         EnumNonMatching(..) => cx.span_bug(trait_span,
-                                           format!("Non-matching enum variants in `deriving({})`",
+                                           format!("non-matching enum variants in `deriving({})`",
                                                   name)),
         StaticEnum(..) | StaticStruct(..) => cx.span_bug(trait_span,
-                                                         format!("Static method in `deriving({})`",
+                                                         format!("static method in `deriving({})`",
                                                                  name))
     }