I made rules for formatting linux sh files in MultiDataViewer.
It's not perfect, but it's fine. Maybe someone could improve it.
Add the following to you "mcinstallpath\Extensions\MultiFileViewer\ColorFormatting.xml" file. Backup first if you like.
<profile name="SH" id="334b5e34f49246d8af418b2db717562b" ext="sh">
<format themecolor="0" textcolor="#008080" backgroundcolor="#00ffff" flags="256">\$\{([^\s]+)</format>
<format themecolor="0" textcolor="#808080" backgroundcolor="-1" flags="256">"\$(\w+)</format>
<format themecolor="0" textcolor="#ff8040" backgroundcolor="#ffffd9" flags="256">\$(\w+)</format>
<format themecolor="0" textcolor="#0000ff" backgroundcolor="-1" flags="256">\b(?:[Cc][Aa][Ss][Ee]|[Dd][Oo]|[Dd][Oo][Nn][Ee]|[Ee][Ll][Ii][Ff]|[Ee][Ll][Ss][Ee]|[Ee][Ss][Aa][Cc]|[Ff][Ii]|[Ff][Oo][Rr]|[Ff][Uu][Nn][Cc]
[Ii][Oo][Nn]|[Ii][Ff]|[Ii][Nn]|[Ss][Ee][Ll][Ee][Cc]|[Hh][Ee][Nn]|[Uu][Nn][Ii][Ll]|[Ww][Hh][Ii][Ll][Ee]|[Ii][Mm][Ee])\b</format>
<format themecolor="0" textcolor="#0000ff" backgroundcolor="-1" flags="256">\b(?:[Cc][Dd]|[Ee][Cc][Hh][Oo])\b</format>
<format themecolor="0" textcolor="#804040" backgroundcolor="#e1fff3" flags="256">`(?:[^"\\]|\\.)*?`</format>
<format themecolor="0" textcolor="#808080" backgroundcolor="-1" flags="256">"(?:[^"\\]|\\.)*?"</format>
<format themecolor="0" textcolor="#ff0000" backgroundcolor="-1" flags="256">\b[0-9]+</format>
<format themecolor="0" textcolor="#804000" backgroundcolor="-1" flags="256">(?:\[|\(|\]|\)|=|\||;|!|\/|-|<|>)</format>
<format themecolor="0" textcolor="#804000" backgroundcolor="-1" flags="2">{,},{}</format>
<format themecolor="0" textcolor="#008000" backgroundcolor="-1" flags="4352">^#</format>
</profile>
