Issue #2555989 by yukare: Configuration schemas missing langcode
Issue #2530384 by yukare: Call to undefined FilterProcessResult::setAssets()
Issue #2501959 by alex43210, gokulnk, yukare: In version from beta10 class String removed, so it's need to use SafeMarkup class
Issue #2422511 by yukare: Configuration objects by default are immutable.
Issue #2353213 by yukare: Fix hook_help
Issue #2395617 by yukare: Setting default_highlighting have the wrong default value
Issue #2395791 by yukare: All css must use libraries
Issue #2395595 by yukare: Fix schema for config
Issue #2395553 by yukare: Update form callbacks.
Issue #2375955 by yukare: default_highlighting selection is broken.
Issue #2373625 by grendzy: default_highlighting should be string, not integer.
Issue #2374931 by kdechant: Call to removed function decode_entities() should be replaced.
Issue #1751286 by yukare: Saving selected languages under text formats doesn't work
Issue #2161119 by yukare: Fatal error in tests: Call to undefined function db_result()
Issue #2047021 by yukare, yrocq: Special chars are html entities in highlighted code.
Issue #2354875 by yukare: Provide a filter for files. This still need more work.
Issue #2353171 by yukare: Clean up the code and make it oo.
Issue #2354683 by OnkelTem: htmlspecialchars() expects parameter 1 to be string, object given in check_plain().
Issue #2353155 by yukare: Update geshifield to Drupal 8.
Issue #2350673 by yukare: Fix filter tips.
Issue #2352291 by yukare: Fix errors in test.
Issue #2351801 by yukare: Add cache tags.
Issue #2350669 by yukare: Upgrade css generation to Drupal 8.
Issue #2350677 by yukare: Update to Drupal 8 beta 1.
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