fix non-ascii

Author: vinay-deshmukh

libcxx/include/__tree

@@ -575,8 +575,8 @@ public:
 // libcxx/test/std/containers/associative/map/map.erasure/erase_if.pass.cpp
 //
 /*
-libcxx/test-suite-install/include/c++/v1/__tree:114:33: error: ‘‘result_decl’ not supported by dump_expr<expression
-error>’ is not a constant expression
+libcxx/test-suite-install/include/c++/v1/__tree:114:33: error: result_decl not supported by dump_expr<expression
+error> is not a constant expression
 
 # |   114 |   return __x == __x->__parent_->__left_;