expansion does not work for keywords when another tree is referenced in the .cli file

[DeekshaBhandary]

Issue is seen when redundant keywords are present in the referenced tree at the same hierarchy

consider tree syntax :
file:op.cli
treename= "op";
show {
word1;
word2;
}

file : test.cli
show {
word3;
word4;
}
@op;

cli: op> show <PRESS ?>
word1
word2
cli :op>

cli: cfg><PRESS ?>
show
show                    <------------------ duplicate keywords
cli: cfg> show <PRESS ?>     <-------------------no suggestion are seen

Expected behaviour :

cli: cfg> show <PRESS ?>
word1
word2
word3
word4
cli: cfg>

[olofhagsand]

Related to clicon/clixon#301 but somewhat larger in that not only duplicate keywords but also no expanded suggestions are seen.
As with #301 it worked in 5.3 but is broken in 5.4 and 5.5

[DeekshaBhandary]

Issue is solved. Thank You