Formatting Tokens 
TWiki defines some standard special tokens that can be used to replace characters in some parameters - notably those to 
FormattedSearch and 
IfStatements - to defer evaluation of the parameter until later. These special tokens are often called "escapes", because they allow the character to "escape" from its normal meaning. 
 $n or $n()  | 
 New line. Use $n() if followed by alphanumeric character, e.g. write Foo$n()Bar instead of Foo$nBar  | 
 $nop or $nop()  | 
 Is a "no operation". This variable gets removed; useful for nested search  | 
 $quot  | 
 Double quote (") (\" also works)  | 
 $percnt  | 
 Percent sign (%)  | 
 $dollar  | 
 Dollar sign ($)  | 
If you ever find yourself needing to escape an escape, you can use 
$dollar to escape the leading dollar, thus: 
$dollarpercnt.