Use fast-syntax-highlighting

Replace zsh-syntax-highlighting plugin with the improved
fast-syntax-highlighting, faster and more accurate.

zshrc

@@ -9,15 +9,24 @@ source-plugin() {
     echo "zsh plugin not found: $1"
   fi
 }
-source-plugin zsh-autosuggestions
-source-plugin zsh-history-substring-search
-source-plugin zsh-syntax-highlighting
-source-plugin autoenv
-source-plugin build
 
+# Fish like automatic suggestions from command history
+source-plugin zsh-autosuggestions
 # Disable non end-of-line autosuggest accept widgets
 ZSH_AUTOSUGGEST_ACCEPT_WIDGETS=(end-of-line vi-end-of-line)
 
+# Search history with a command substring
+source-plugin zsh-history-substring-search
+
+# Command syntax highlighting
+source-plugin fast-syntax-highlighting
+
+# Automatically source .enter and .exit scripts on cd
+source-plugin autoenv
+
+# Build system helper commands
+source-plugin build
+
 # Remove duplicates from history
 setopt hist_ignore_all_dups
 setopt hist_reduce_blanks