There are multiple issues with Moodle files containing empty or blank lines
(lines consisting of white spaces or tabs only) and/or white space before or
after the PHP open and close tags, notably with config.php and theme files.
* in_null for decimals defaults checks
* store letter settings only in database - no cfg settings
* separate configuration page for letters only - pluginselector+admin tree
* new capability to manage grade letters - similar to scales and outcomes
* added grade_letters db index
* grade letters related minor bugfixing
nicolasconnault