fix whitespace regular expression
use $n instead of str.sub(/foo/,"")
delete delete string function from escape
use $n instead of str.sub(/foo/,"") for command_escape
use $n instead of str.sub(/foo/,"") for @shell_c and @shell_cpp
fix multi line support for $n
use $n instead of str.sub(/foo/,"") for @compile and @script
fix regular expression for postal search