diff --git a/src/strategies/predefined.zsh b/src/strategies/predefined.zsh
index 03b4671..138f79c 100644
--- a/src/strategies/predefined.zsh
+++ b/src/strategies/predefined.zsh
@@ -16,55 +16,55 @@ _zsh_autosuggest_script_path="${0:A:h}"
 _zsh_autosuggest_data_home="${XDG_DATA_HOME:-$HOME/.local/share}/zsh_autosuggest"
 
 _zsh_autosuggest_predefined_generate() {
-	local pbase="$_zsh_autosuggest_data_home"
+    local pbase="$_zsh_autosuggest_data_home"
     local pname="$pbase/predefined"
-	local ptemp="$pbase/predefined.$[RANDOM]"
+    local ptemp="$pbase/predefined.$[RANDOM]"
     local suggests=()
     local pwd=$(pwd)
 
-	[ ! -d "$pbase" ] && mkdir -p "$pbase" 2> /dev/null
-	
-	# skip when ~/.zsh_autosuggest exists
-	[ -f "$pname" ] && return
+    [ ! -d "$pbase" ] && mkdir -p "$pbase" 2> /dev/null
+    
+    # skip when ~/.zsh_autosuggest exists
+    [ -f "$pname" ] && return
 
-	echo "autosuggestions is generating: $pname"
+    echo "autosuggestions is generating: $pname"
 
-	# copy builtin predefine database
-	local txt="${_zsh_autosuggest_script_path}/predefined.txt"
+    # copy builtin predefine database
+    local txt="${_zsh_autosuggest_script_path}/predefined.txt"
 
-	[ -f "$txt" ] && cat "$txt" > "$ptemp"
+    [ -f "$txt" ] && cat "$txt" > "$ptemp"
 
-	# enumerate commands in $PATH and add them to ~/.zsh_autosuggest
+    # enumerate commands in $PATH and add them to ~/.zsh_autosuggest
     for p ("${(@s/:/)PATH}"); do
-		[ ! -d "$p" ] && continue
-		cd "$p"
-		local files=("${(@f)$(ls -la | awk -F ' ' '{print $9}')}")
-		for fn in ${files}; do
-			if [ -x "$fn" ] && [[ "${fn:l}" != *.dll ]]; then
-				if [ -f "$fn" ] && [[ "${fn:l}" != *.nls ]]; then
-					# trim cygwin .exe/.cmd/.bat postfix
-					if [[ "$fn" == *.exe ]]; then
-						fn=${fn/%.exe/}
-					elif [[ "$fn" == *.cmd ]]; then
-						fn=${fn/%.cmd/}
-					elif [[ "$fn" == *.bat ]]; then
-						fn=${fn/%.bat/}
-					fi
-					if [[ ${#fn} -gt 1 ]]; then
-						suggests+=$fn
-					fi
-				fi
-			fi
-		done
+        [ ! -d "$p" ] && continue
+        cd "$p"
+        local files=("${(@f)$(ls -la | awk -F ' ' '{print $9}')}")
+        for fn in ${files}; do
+            if [ -x "$fn" ] && [[ "${fn:l}" != *.dll ]]; then
+                if [ -f "$fn" ] && [[ "${fn:l}" != *.nls ]]; then
+                    # trim cygwin .exe/.cmd/.bat postfix
+                    if [[ "$fn" == *.exe ]]; then
+                        fn=${fn/%.exe/}
+                    elif [[ "$fn" == *.cmd ]]; then
+                        fn=${fn/%.cmd/}
+                    elif [[ "$fn" == *.bat ]]; then
+                        fn=${fn/%.bat/}
+                    fi
+                    if [[ ${#fn} -gt 1 ]]; then
+                        suggests+=$fn
+                    fi
+                fi
+            fi
+        done
     done
     cd "${pwd}"
 
-	# TODO: generate command parameters from completion database
-	
-	print -l $suggests >> "$ptemp"
+    # TODO: generate command parameters from completion database
+    
+    print -l $suggests >> "$ptemp"
 
-	# atomic change file name
-	mv -f "$ptemp" "$pname"
+    # atomic change file name
+    mv -f "$ptemp" "$pname"
 }
 
 
@@ -73,16 +73,16 @@ _zsh_autosuggest_strategy_predefined() {
     setopt EXTENDED_GLOB
     local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
 
-	# search the history at first
+    # search the history at first
     local result="${history[(r)${prefix}*]}"
 
-	# search the predefine files if nothing found in history
+    # search the predefine files if nothing found in history
     if [[ -z "$result" ]]; then
         if (( ! ${+_ZSH_AUTOSUGGEST_PREDEFINE} )); then
-			# _zsh_autosuggest_predefined_generate
+            # _zsh_autosuggest_predefined_generate
             typeset -g _ZSH_AUTOSUGGEST_PREDEFINE=()
-			local pbase="$_zsh_autosuggest_data_home"
-			local pname="$pbase/predefined"
+            local pbase="$_zsh_autosuggest_data_home"
+            local pname="$pbase/predefined"
             local names="${ZSH_AUTOSUGGEST_PREDEFINE_PATH};$pname"
             local array=()
             for i ("${(s:;:)names}"); do
@@ -102,6 +102,6 @@ _zsh_autosuggest_strategy_predefined() {
 
 _zsh_autosuggest_predefined_generate
 
-#  vim: set ts=4 sw=4 tw=0 noet :
+#  vim: set ts=4 sw=4 tw=0 et :
 
 
diff --git a/zsh-autosuggestions.zsh b/zsh-autosuggestions.zsh
index 020d386..c592eb4 100644
--- a/zsh-autosuggestions.zsh
+++ b/zsh-autosuggestions.zsh
@@ -582,55 +582,55 @@ _zsh_autosuggest_script_path="${0:A:h}"
 _zsh_autosuggest_data_home="${XDG_DATA_HOME:-$HOME/.local/share}/zsh_autosuggest"
 
 _zsh_autosuggest_predefined_generate() {
-	local pbase="$_zsh_autosuggest_data_home"
+    local pbase="$_zsh_autosuggest_data_home"
     local pname="$pbase/predefined"
-	local ptemp="$pbase/predefined.$[RANDOM]"
+    local ptemp="$pbase/predefined.$[RANDOM]"
     local suggests=()
     local pwd=$(pwd)
 
-	[ ! -d "$pbase" ] && mkdir -p "$pbase" 2> /dev/null
-	
-	# skip when ~/.zsh_autosuggest exists
-	[ -f "$pname" ] && return
+    [ ! -d "$pbase" ] && mkdir -p "$pbase" 2> /dev/null
+    
+    # skip when ~/.zsh_autosuggest exists
+    [ -f "$pname" ] && return
 
-	echo "autosuggestions is generating: $pname"
+    echo "autosuggestions is generating: $pname"
 
-	# copy builtin predefine database
-	local txt="${_zsh_autosuggest_script_path}/predefined.txt"
+    # copy builtin predefine database
+    local txt="${_zsh_autosuggest_script_path}/predefined.txt"
 
-	[ -f "$txt" ] && cat "$txt" > "$ptemp"
+    [ -f "$txt" ] && cat "$txt" > "$ptemp"
 
-	# enumerate commands in $PATH and add them to ~/.zsh_autosuggest
+    # enumerate commands in $PATH and add them to ~/.zsh_autosuggest
     for p ("${(@s/:/)PATH}"); do
-		[ ! -d "$p" ] && continue
-		cd "$p"
-		local files=("${(@f)$(ls -la | awk -F ' ' '{print $9}')}")
-		for fn in ${files}; do
-			if [ -x "$fn" ] && [[ "${fn:l}" != *.dll ]]; then
-				if [ -f "$fn" ] && [[ "${fn:l}" != *.nls ]]; then
-					# trim cygwin .exe/.cmd/.bat postfix
-					if [[ "$fn" == *.exe ]]; then
-						fn=${fn/%.exe/}
-					elif [[ "$fn" == *.cmd ]]; then
-						fn=${fn/%.cmd/}
-					elif [[ "$fn" == *.bat ]]; then
-						fn=${fn/%.bat/}
-					fi
-					if [[ ${#fn} -gt 1 ]]; then
-						suggests+=$fn
-					fi
-				fi
-			fi
-		done
+        [ ! -d "$p" ] && continue
+        cd "$p"
+        local files=("${(@f)$(ls -la | awk -F ' ' '{print $9}')}")
+        for fn in ${files}; do
+            if [ -x "$fn" ] && [[ "${fn:l}" != *.dll ]]; then
+                if [ -f "$fn" ] && [[ "${fn:l}" != *.nls ]]; then
+                    # trim cygwin .exe/.cmd/.bat postfix
+                    if [[ "$fn" == *.exe ]]; then
+                        fn=${fn/%.exe/}
+                    elif [[ "$fn" == *.cmd ]]; then
+                        fn=${fn/%.cmd/}
+                    elif [[ "$fn" == *.bat ]]; then
+                        fn=${fn/%.bat/}
+                    fi
+                    if [[ ${#fn} -gt 1 ]]; then
+                        suggests+=$fn
+                    fi
+                fi
+            fi
+        done
     done
     cd "${pwd}"
 
-	# TODO: generate command parameters from completion database
-	
-	print -l $suggests >> "$ptemp"
+    # TODO: generate command parameters from completion database
+    
+    print -l $suggests >> "$ptemp"
 
-	# atomic change file name
-	mv -f "$ptemp" "$pname"
+    # atomic change file name
+    mv -f "$ptemp" "$pname"
 }
 
 
@@ -639,16 +639,16 @@ _zsh_autosuggest_strategy_predefined() {
     setopt EXTENDED_GLOB
     local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
 
-	# search the history at first
+    # search the history at first
     local result="${history[(r)${prefix}*]}"
 
-	# search the predefine files if nothing found in history
+    # search the predefine files if nothing found in history
     if [[ -z "$result" ]]; then
         if (( ! ${+_ZSH_AUTOSUGGEST_PREDEFINE} )); then
-			# _zsh_autosuggest_predefined_generate
+            # _zsh_autosuggest_predefined_generate
             typeset -g _ZSH_AUTOSUGGEST_PREDEFINE=()
-			local pbase="$_zsh_autosuggest_data_home"
-			local pname="$pbase/predefined"
+            local pbase="$_zsh_autosuggest_data_home"
+            local pname="$pbase/predefined"
             local names="${ZSH_AUTOSUGGEST_PREDEFINE_PATH};$pname"
             local array=()
             for i ("${(s:;:)names}"); do
@@ -668,7 +668,7 @@ _zsh_autosuggest_strategy_predefined() {
 
 _zsh_autosuggest_predefined_generate
 
-#  vim: set ts=4 sw=4 tw=0 noet :
+#  vim: set ts=4 sw=4 tw=0 et :