Reverted commit 3d22faa.
Reverted commit 3d22faa.

This reverts commit 3d22faa5e25994f193f2a12ed5a06672cfcdede2.

# Conflicts:
#	src/parser.cpp

cellml/libcellml,nickerso/libcellml,nickerso/libcellml,hsorby/libcellml,MichaelClerx/libcellml,hsorby/libcellml,nickerso/libcellml,nickerso/libcellml,cellml/libcellml,MichaelClerx/libcellml,MichaelClerx/libcellml,hsorby/libcellml,cellml/libcellml,cellml/libcellml,hsorby/libcellml