fix regexp match and add test

[oslivan]

SearchForParams function will be fine in most of case, but the following text won't work.

# command 
cat <<EOF > <file=path/to/file>
EOF

In general, the param name must be characters, so I replaced \S to \w, and the unit test was submitted.

[RamiAwar]

It seems like this is fixed in another PR! Here's your test with the current regex pattern:

[RamiAwar]

I like the test however, will add that in in a separate PR :)