MDL-27200 missing {} in various lang strings.

lang/en/grades.php

@@ -235,7 +235,7 @@
 $string['gradeexportdecimalpoints_desc'] = 'The number of decimal points to display for export. This can be overridden during export.';
 $string['gradeexportdisplaytype'] = 'Grade export display type';
 $string['gradeexportdisplaytype_desc'] = 'Grades can be shown as real grades, as percentages (in reference to the minimum and maximum grades) or as letters (A, B, C etc..) during export. This can be overridden during export.';
-$string['gradeforstudent'] = '{$a->student}<br />{$a->item}$a->feedback';
+$string['gradeforstudent'] = '{$a->student}<br />{$a->item}{$a->feedback}';
 $string['gradehelp'] = 'Grade help';
 $string['gradehistorylifetime'] = 'Grade history lifetime';
 $string['gradehistorylifetime_help'] = 'This specifies the length of time you want to keep history of changes in grade related tables. It is recommended to keep it as long as possible. If you experience performance problems or have limited database space, try to set lower value.';

question/type/calculated/lang/en/qtype_calculated.php

@@ -70,7 +70,7 @@
 $string['functiontakestwoargs'] = 'The function {$a} must have exactly two arguments';
 $string['generatevalue'] = 'Generate a new value between';
 $string['getnextnow'] = 'Get new \'Item to Add\' now';
-$string['hexanotallowed'] = 'Dataset <strong>{$a->name}</strong> hexadecimal format value $a->value is not allowed';
+$string['hexanotallowed'] = 'Dataset <strong>{$a->name}</strong> hexadecimal format value {$a->value} is not allowed';
 $string['illegalformulasyntax'] = 'Illegal formula syntax starting with \'{$a}\'';
 $string['incorrectfeedback'] = 'For any incorrect response';
 $string['item(s)'] = 'item(s)';