Refactor to remove prev cmd function and simplify escaping

src/strategies/default.zsh

@@ -7,7 +7,7 @@
 #
 
 _zsh_autosuggest_strategy_default() {
-	local prefix="$(_zsh_autosuggest_escape_command "$1")"
+	local prefix="$1"
 
 	# Get the keys of the history items that match
 	local -a histkeys

src/strategies/match_prev_cmd.zsh

@@ -18,7 +18,7 @@
 #
 
 _zsh_autosuggest_strategy_match_prev_cmd() {
-	local prefix="$(_zsh_autosuggest_escape_command "$1")"
+	local prefix="$1"
 
 	# Get all history event numbers that correspond to history
 	# entries that match pattern $prefix*
@@ -29,8 +29,7 @@ _zsh_autosuggest_strategy_match_prev_cmd() {
 	local histkey="${history_match_keys[1]}"
 
 	# Get the previously executed command
-	local prev_cmd="$(_zsh_autosuggest_prev_command)"
-	prev_cmd="$(_zsh_autosuggest_escape_command "$prev_cmd")"
+	local prev_cmd="$(_zsh_autosuggest_escape_command "${history[$((HISTCMD-1))]}")"
 
 	# Iterate up to the first 200 history event numbers that match $prefix
 	for key in "${(@)history_match_keys[1,200]}"; do

src/suggestion.zsh

@@ -5,11 +5,11 @@
 
 # Delegate to the selected strategy to determine a suggestion
 _zsh_autosuggest_suggestion() {
-	local prefix="$1"
+	local escaped_prefix="$(_zsh_autosuggest_escape_command "$1")"
 	local strategy_function="_zsh_autosuggest_strategy_$ZSH_AUTOSUGGEST_STRATEGY"
 
 	if [ -n "$functions[$strategy_function]" ]; then
-		echo -E "$($strategy_function "$prefix")"
+		echo -E "$($strategy_function "$escaped_prefix")"
 	fi
 }
 
@@ -19,8 +19,3 @@ _zsh_autosuggest_escape_command() {
 	# Escape special chars in the string (requires EXTENDED_GLOB)
 	echo -E "${1//(#m)[\\()\[\]|*?]/\\$MATCH}"
 }
-
-# Get the previously executed command
-_zsh_autosuggest_prev_command() {
-	echo -E "${history[$((HISTCMD-1))]}"
-}