because in 2 cases the assert.equals for several assertions
had long arguments, those arguments were misaligned when changing
to assert.strictEquals so this commit adds the extra space
for alignment.

in both cases, the final argument with prepended whitespace
extends past the 80 char limit, so these args end up being split
onto 2 lines

in 2 cases the change to strictEquals caused extra indentation which
made the concatenated assertion failure messages span 2 lines - these
were switched to use template strings instead where they now fit onto
a single line within the 80 char limit

additionally updated the last 2 assertion messages using template
strings in order to remain consistent.