* tests/input.at (Invalid $n, Invalid @n): Add the ending `;'.

* tests/output.at (AT_CHECK_OUTPUT): Likewise.
* tests/headers.at (AT_TEST_CPP_GUARD_H): Ditto.
* tests/semantic.at (Parsing Guards): Similarly.
* src/reader.at (readgram): Complain if the last rule is not ended
with a semi-colon.

tests/semantic.at

@@ -38,7 +38,7 @@ AT_DATA([input.y],
 %%
 exp: exp '+' exp { $$ = $1 + $3 }
    | exp '/' exp %guard { if ($3 == 0) yyerror = 1 } { $$ = $1 / $3 }
-   | INT
+   | INT;
 %%
 ]])