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Conform to RFC 822 and 5322:

- Add support for nested comments.

- Add support for escaped characters in comments.

- Extend support for escaped characters in quoted strings.

- Extend and update test cases accordingly.

BUG: 425345
FIXED-IN: 5.79.0

Bash: fix } in ${!xy*} and more Parameter Expansion Operator (# in ${#xy} ; !,*,@,[*],[@] in ${!xy*})

BUG: 430668

NO_CHANGELOG

Merge branch 'master' of https://invent.kde.org/frameworks/syntax-highlighting into work/monokaifixes

Syntax changes have been made to the language of the Linux kernel
configuration system. A lot of new things have been added and a few
have been removed.

Update kconfig.xml accordingly. Still recognize the parts that have
been removed, but mark them as deprecated with strikeOut="true".

While at it, fix a few bugs and unify the code style.

 - Mark "boolean" type as deprecated and permit "boolean" as identifier
   (but warn about it).

 - Mark "env" option as deprecated.

 - Mark old use of environment variables (e.g. $ARCH) as deprecated.

 - Mark "---help---" property as deprecated.

 - Mark dot and slash in unquoted strings as deprecated.

 - Mark unquoted prompts as deprecated.

 - Enhance support for Makefile style variable expansions with $(...).

 - Add support for Makefile style variables and assignments (+=, :=, =).

 - Add basic support for Makefile style function calls and function
   definitions. Recognize builtin functions.

 - Imitate the highlighting from the Makefile highlighting definition
   for Makefile style features.

 - Add spellChecking="false" to itemData "unquotedMainmenuPrompt".

 - Set spellChecking="true" to itemData "quotedMainmenuPrompt".

 - Add Config.* to extensions. Some projects (e.g. BusyBox and OpenWrt)
   have kept using this ancient naming scheme from CML1.

 - Lower priority from 0 to -9, because Config.* may conflict with
   a lot of other extensions, while the other way round is exotic,
   i.e. the names of the correct files usually do not clash with
   other extensions.

 - Revert help text detection to the old, very verbatim mechanism
   (sorry, the last, shorter version with dynamic="true" fails
   recognition in quite a few real-world cases in the mainline kernel).

 - Fix a few edge cases in that help text detection and remove a few no
   longer needed contexts.

 - Add recognition of links in angle brackets for help texts.

 - Enhance support for escaped characters.

 - #pop context of config_option_list instead of error on fallthrough.

 - Update file comments, i.e. update URL to kconfig-frontends, update
   some version numbers, remove hints that are no longer true and update
   the language syntax changelog.

 - Unify style, e.g. naming scheme and sorting of XML attributes.

Colors for Search / Replace and Matching brackets have been updated to
be more visible.

Monokai blue was incorrect in a few places, that has
been fixed.

NO_CHANGELOG

use a color similar to the background color for BracketMatching

QOverload, QConstOverload and QNonConstOverload are helper classes for
C++11-only code where qOverload (which requires C++14) can't be used.

https://doc.qt.io/qt-5/qguiapplication.html#qGuiApp

add weakDeliminator and additionalDeliminator with keyword, WordDetect, Int, Float, HlCOct and HlCHex