Add a test.


git-svn-id: https://fricas.svn.sourceforge.net/svnroot/fricas/trunk@1568 b0c55286-4f34-0410-a049-a1e7e93b0762
Update release notes.


git-svn-id: https://fricas.svn.sourceforge.net/svnroot/fricas/trunk@1569 b0c55286-4f34-0410-a049-a1e7e93b0762
Add mising backslash, remove potentially unportable construct.


git-svn-id: https://fricas.svn.sourceforge.net/svnroot/fricas/trunk@1572 b0c55286-4f34-0410-a049-a1e7e93b0762
Bind '$' only during evaluation of categories.


git-svn-id: https://fricas.svn.sourceforge.net/svnroot/fricas/trunk@1574 b0c55286-4f34-0410-a049-a1e7e93b0762