spec -> specs

test/custom-formatter-test.cc

@@ -32,7 +32,7 @@ class custom_arg_formatter
 
   iterator operator()(double value) {
     // Comparing a float to 0.0 is safe.
-    if (round(value * pow(10, spec()->precision)) == 0.0) value = 0;
+    if (round(value * pow(10, specs()->precision)) == 0.0) value = 0;
     return base::operator()(value);
   }
 };