/usr/lib/x86_64-linux-gnu/fis-gtm/V6.3-000A_x86_64/_trim.m is in fis-gtm-6.3-000a 6.3-000A-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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; ;
; Copyright 2012, 2014 Fidelity Information Services, Inc ;
; ;
; This source code contains the intellectual property ;
; of its copyright holder(s), and is made available ;
; under a license. If you do not know the terms of ;
; the license, please stop and do not read further. ;
; ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
%TRIM ; routine to strip of leading and trailing characters; defaulting to spaces and tabs
for read line quit:$zeof write $$FUNC(line),!
quit
FUNC(s,ch)
set:'$length($get(ch)) ch=$char(9,32)
quit $$L($$R(s,ch),ch)
L(s,ch) new i,len,tmp
set:'$length($get(ch)) ch=$char(9,32)
set len=$length(s)
for i=1:1:len+1 quit:ch'[$extract(s,i)
quit $extract(s,i,len)
R(s,ch) new i,tmp
set:'$length($get(ch)) ch=$c(9,32)
for i=$length(s):-1:0 quit:ch'[$extract(s,i)
quit $extract(s,1,i)
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