- Remove trailing '\n' when getting the API error message.

runtime/vm/dart_api_impl.cc

Index: runtime/vm/dart_api_impl.cc
===================================================================
--- runtime/vm/dart_api_impl.cc	(revision 8601)
+++ runtime/vm/dart_api_impl.cc	(working copy)
@@ -298,6 +298,10 @@
     intptr_t len = strlen(str) + 1;
     char* str_copy = reinterpret_cast<char*>(Api::Allocate(isolate, len));
     strncpy(str_copy, str, len);
+    // Strip a possible trailing '\n'.
+    if ((len > 1) && (str_copy[len - 2] == '\n')) {
+      str_copy[len - 2] = '\0';
+    }
     return str_copy;
   } else {
     return "";