MDL-35003 questions: remove stray full stop after correct answer.

In a few situations, this full stop makes things a bit more grammatical,
but there are many other situations where it causes problems. So, on
balance we will remove it.

question/type/match/lang/en/qtype_match.php

@@ -25,7 +25,7 @@
 
 $string['addmoreqblanks'] = '{no} More Sets of Blanks';
 $string['availablechoices'] = 'Available choices';
-$string['correctansweris'] = 'The correct answer is: {$a}.';
+$string['correctansweris'] = 'The correct answer is: {$a}';
 $string['filloutthreeqsandtwoas'] = 'You must provide at least two questions and three answers. You can provide extra wrong answers by giving an answer with a blank question. Entries where both the question and the answer are blank will be ignored.';
 $string['nomatchinganswer'] = 'You must specify an answer matching the question \'{$a}\'.';
 $string['nomatchinganswerforq'] = 'You must specify an answer for this question.';

question/type/multichoice/lang/en/qtype_multichoice.php

@@ -37,7 +37,7 @@
 $string['choiceno'] = 'Choice {$a}';
 $string['choices'] = 'Available choices';
 $string['clozeaid'] = 'Enter missing word';
-$string['correctansweris'] = 'The correct answer is: {$a}.';
+$string['correctansweris'] = 'The correct answer is: {$a}';
 $string['correctfeedback'] = 'For any correct response';
 $string['errgradesetanswerblank'] = 'Grade set, but the Answer is blank';
 $string['errfractionsaddwrong'] = 'The positive grades you have chosen do not add up to 100%<br />Instead, they add up to {$a}%';

question/type/shortanswer/lang/en/qtype_shortanswer.php

@@ -30,7 +30,7 @@
 $string['caseno'] = 'No, case is unimportant';
 $string['casesensitive'] = 'Case sensitivity';
 $string['caseyes'] = 'Yes, case must match';
-$string['correctansweris'] = 'The correct answer is: {$a}.';
+$string['correctansweris'] = 'The correct answer is: {$a}';
 $string['correctanswers'] = 'Correct answers';
 $string['filloutoneanswer'] = 'You must provide at least one possible answer. Answers left blank will not be used. \'*\' can be used as a wildcard to match any characters. The first matching answer will be used to determine the score and feedback.';
 $string['notenoughanswers'] = 'This type of question requires at least {$a} answers';