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strtrim Scol 5.2 or above required

Remove space (' '), tabulation ('\t') and return ('\n') characters in a string (at the start, at the end).

Prototype :

fun [S] S

• S : a string

Return : S a new string or nil if error

Error :

• EOK if no error.
• EARGNIL if the argument is nil.

See also :

Example :

// sprintf is in the Syspack API
fun main ()=
	_showconsole;
	
	let "  Bob and Alice    " -> s in
	(
	_fooS sprintf "__%s__" [s];		// __  Bob and Alice    __
	set s = strtrim s;
	_fooS sprintf "__%s__" [s];		// __Bob and Alice__
	);
	0;;