[matlab] [cpd] Parse error with backslashes in string literals

[chrite]

Description:
I tried using cpd on Windows 10 in a medium large code base, but got a (wrong?) Lexical error immediately. I think MATLAB's weird sometimes-escape-character \ isn't handled properly:

net.sourceforge.pmd.lang.ast.TokenMgrError: Lexical error in file Untitled.m at line 3, column 56.  Encountered: "$" (36), after : ""
        at net.sourceforge.pmd.lang.matlab.ast.MatlabParserTokenManager.getNextToken(MatlabParserTokenManager.java:1996)
        at net.sourceforge.pmd.lang.matlab.MatlabTokenManager.getNextToken(MatlabTokenManager.java:31)
        at net.sourceforge.pmd.cpd.token.internal.BaseTokenFilter.getNextToken(BaseTokenFilter.java:30)
        at net.sourceforge.pmd.cpd.internal.JavaCCTokenizer.tokenize(JavaCCTokenizer.java:40)
        at net.sourceforge.pmd.cpd.CPD.addAndThrowLexicalError(CPD.java:144)
        at net.sourceforge.pmd.cpd.CPD.add(CPD.java:139)
        at net.sourceforge.pmd.cpd.CPD.add(CPD.java:108)
        at net.sourceforge.pmd.cpd.CPD.add(CPD.java:70)
        at net.sourceforge.pmd.cpd.CPD.addDirectory(CPD.java:80)
        at net.sourceforge.pmd.cpd.CPD.addRecursively(CPD.java:65)
        at net.sourceforge.pmd.cpd.CPDCommandLineInterface.addSourcesFilesToCPD(CPDCommandLineInterface.java:134)
        at net.sourceforge.pmd.cpd.CPDCommandLineInterface.addSourceFilesToCPD(CPDCommandLineInterface.java:114)
        at net.sourceforge.pmd.cpd.CPDCommandLineInterface.main(CPDCommandLineInterface.java:87)
        at net.sourceforge.pmd.cpd.CPD.main(CPD.java:179)

--ignore-literals doesn't help as a work-around either...

Code Sample demonstrating the issue:

names = {'hallo_welt', 'hello_world'};
texEscape = strrep(names, '_', '\_');

or

nameUnit = 'hello [world]';
name = strtrim(regexprep(nameUnit, '\s\[.*\]$', ''));