significantly improved zsh* syntax highlighting (started from sh.nanorc)

zsh.nanorc

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+## Syntax highlighting for ZSH scripts (initially copied from sh.nanorc)
+syntax "zsh" "\.?zsh[^\.]+?$"
+header "^#!.*/(env +)?zsh( |$)"
+
+## Numbers
+color brightyellow "\b[0-9]+\b"
+
+## Conditionals and control flow
+color green "\<(always|case|do|done|elif|else|esac|exit|fi|for|function|if|in|local|read|return|select|shift|then|time|until|while)\>"
+color green "(\{|\}|\(|\)|\;|\]|\[|`|\\|\$|<|>|!|=|&|\|)"
+## Conditional flags
+color green "-[Ldefgruwx]\>"
+color green "-(eq|ne|gt|lt|ge|le|s|n|z)\>"
+
+## Bash-inherited
+color brightblue "\<(alias|bindkey|builtin|cd|eval|exec|export|jobs|let|popd|pushd|set|source|typeset|umask|unset)\>"
+## ZSH-specific
+color brightblue "\<(add-zsh-hook|autoload|compinit|echotc|emulate|print|prompt(init)?|setopt|zle|zmodload|zstyle)\>"
+## Common linux commands
+color brightmagenta "\<(cat|chmod|chown|cp|cut|echo|env|false|find|grep|head|install|kill|less|ln|make|mkdir|mv|nice|pwd|rm|rmdir|sed|tar|true|touch|uname|wc|whoami)\>"
+
+## Function definition
+icolor brightgreen "^\s+?(function\s+)?[0-9A-Z_]+\s+?\(\)"
+
+## Variables
+icolor brightred "\$\{?[0-9A-Z_!@#$*?-]+\}?"
+
+## Strings
+color yellow ""(\\.|[^"])*""
+color yellow "'(\\.|[^'])*'"
+
+## Comments
+color cyan "(^|[[:space:]])#.*$"
+color brightcyan "(^|[[:space:]])##.*$"
+
+## Trailing spaces
+color ,blue "[[:space:]]+$"