Correct expected string.
Correct expected string.

Forgot that when appending the math the whitespace between math elements in the file
will be dropped from the component's math string.

nickerso/libcellml,hsorby/libcellml,cellml/libcellml,MichaelClerx/libcellml,nickerso/libcellml,MichaelClerx/libcellml,nickerso/libcellml,libcellml/buildbot-testing,cellml/libcellml,MichaelClerx/libcellml,hsorby/libcellml,hsorby/libcellml,libcellml/buildbot-testing,nickerso/libcellml,cellml/libcellml,hsorby/libcellml,cellml/libcellml