Fix '// Error' in examples to use '// error' instead.

Author: zygoloid

source/compatibility.tex

@@ -1617,7 +1617,7 @@
 };
 struct derived : base {};
 
-derived d1{};       // Error. The code was well-formed before.
+derived d1{};       // error; the code was well-formed in \CppXIV
 derived d2;         // still OK
 \end{codeblock}
 

source/declarations.tex

@@ -1444,10 +1444,10 @@
   -> decltype((h<T>()));        // does not force completion of \tcode{A<T>}; \tcode{A<T>::\~{}A()} is not implicitly
                                 // used within the context of this \grammarterm{decltype-specifier}
 void r() {
-  q(42);                        // Error: deduction against \tcode{q} succeeds, so overload resolution selects
-                                // the specialization ``\tcode{q(T) -> decltype((h<T>())) [with T=int]}''.
-                                // The return type is \tcode{A<int>}, so a temporary is introduced and its
-                                // destructor is used, so the program is ill-formed.
+  q(42);                        // error: deduction against \tcode{q} succeeds, so overload resolution selects
+                                // the specialization ``\tcode{q(T) -> decltype((h<T>())) [with T=int]}'';
+                                // the return type is \tcode{A<int>}, so a temporary is introduced and its
+                                // destructor is used, so the program is ill-formed
 }
 \end{codeblock}
 \end{example}

source/overloading.tex

@@ -294,7 +294,7 @@
 void prog () {
     f (1, 2);                   // OK: call \tcode{f(int, int)}
     f (1);                      // OK: call \tcode{f(int, int)}
-    f ();                       // Error: \tcode{f(int, int)} or \tcode{f()}?
+    f ();                       // error: \tcode{f(int, int)} or \tcode{f()}?
 }
 \end{codeblock}
 \end{example}
@@ -1840,7 +1840,7 @@
 
 void use() {
   f(3);             // OK, default argument was not used for viability
-  f();              // Error: found default argument twice
+  f();              // error: found default argument twice
 }
 \end{codeblock}
 \end{example}