fix(plugin/error_vis/popups.py): small fix to parse doxygen special comment blocks (#748)
fix(plugin/error_vis/popups.py): small fix to parse doxygen special comment blocks (#748)

This tiny change solves issue #728 , in which doxygen special comments use the '!' char.
Instead of just stripping away leading '/' and '*' chars from the start of each comment line, now '!' chars are also stripped away.
niosus/EasyClangComplete,niosus/EasyClangComplete,niosus/EasyClangComplete