Use single-quoted strings in execute action

Close #590

CHANGELOG.md

@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+0.12.3
+------
+- `{}` in execute action is replaced to the single-quoted string of the
+  current line
+
 0.12.2
 ------
 

src/terminal.go

@@ -743,7 +743,7 @@ func keyMatch(key int, event C.Event) bool {
 }
 
 func quoteEntry(entry string) string {
-	return fmt.Sprintf("%q", entry)
+	return "'" + strings.Replace(entry, "'", "'\\''", -1) + "'"
 }
 
 func executeCommand(template string, replacement string) {