Bad support of heredoc notations

[dosyfier]

Expected behavior

Heredoc notation is a common way to define usage functions within shell scripts.
It is expected from i-Code analysis to support such notation.

Actual behavior

When a heredoc syntax is used with text containing an apostrophe, i-Code stops the analysis (no further analysis of any file given as argument to i-Code). The following error is displayed:

!ENTRY org.eclipse.osgi 4 0 2019-09-11 13:16:02.795
!MESSAGE Application error
!STACK 1
fr.cnes.analysis.tools.analyzer.exception.JFlexException: i-Code CNES analysis encountered a problem.

Analysis failure : At least one function is not ending correctly.
CheckerId: fr.cnes.analysis.tools.shell.metrics.SHMETNesting
File: sample.sh
Line:11
Column:0
Last word scanned : [] []
Please report this issue on : https://github.com/dupuisa/i-CodeCNES/issues/
	at fr.cnes.analysis.tools.shell.metrics.SHMETNesting.run(SHMETNesting.java:841)
	at fr.cnes.analysis.tools.analyzer.CallableChecker.call(CallableChecker.java:65)
	at fr.cnes.analysis.tools.analyzer.CallableChecker.call(CallableChecker.java:1)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Icode: Cannot open display: 
Icode:

Steps to reproduce behavior

Create a sample script (sample.sh) with the following content:

#!/bin/bash

usage() {
  cat <<-EOU
  Usage : myfunction [options] parameters

  Downloads JARs into this script's directory.
EOU
}

usage

and simply run icode on it: <i-code_install_path>/icode sample.sh.
If I simply remove the 's after the word script, the previous error goes away.

Detection version

3.0.0