make .zsh* highlighting significantly better (started from sh)

nanorc

@@ -64,4 +64,4 @@ include ~/.nano/xml.nanorc
 include ~/.nano/xresources.nanorc
 include ~/.nano/yaml.nanorc
 include ~/.nano/yum.nanorc
-include ~/.nano/zshrc.nanorc
+include ~/.nano/zsh.nanorc

zsh.nanorc

@@ -0,0 +1,31 @@
+## Syntax highlighting for zsh scripts (initially copied from sh.nanorc)
+syntax "zsh" "\.zsh[^\.]+?$"
+header "^#!.*/zsh"
+
+## Function definition
+icolor brightgreen "^[0-9A-Z_]+\(\)"
+
+## Conditionals and control flow
+color green "\<(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 / common linux commands
+color brightblue "\<(alias|bindkey|cat|cd|chmod|chown|cp|echo|env|export|grep|install|let|ln|make|mkdir|mv|rm|sed|set|source|tar|touch|umask|unset)\>"
+## zsh-specific
+color brightblue "\<(autoload|compinit|prompt(init)?|setopt|zmodload|zstyle)\>"
+
+## Variables
+icolor brightred "\$\{?[0-9A-Z_!@#$*?-]+\}?"
+
+## Comments
+color cyan "(^|[[:space:]])#.*$"
+
+## Strings
+color brightyellow ""(\\.|[^"])*""
+color brightyellow "'(\\.|[^'])*'"
+
+## Trailing spaces
+#color ,green "[[:space:]]+$"

zshrc.nanorc

@@ -1,14 +0,0 @@
-## Hightlightings for zsh configuration files (most used keywords)
-syntax "zshrc" "\.?zshrc$"
-
-## Keywords
-color red "\<(autoload|prompt(init)?|zstyle|zmodload|compinit|setopt|export|source)\>"
-color magenta "\<(alias|bindkey|function)\>"
-
-## Strings
-icolor white ""(\\.|[^"])*""
-icolor white "'(\\.|[^'])*'"
-
-## Comments
-icolor brightblue "^[[:space:]]*#.*$"
-icolor cyan "^[[:space:]]*##.*$"