GitLab

Create new files for the preamble, the body of the report, and each individual page of the report.

Revert when minimum supported Matlab version >= R2012a

On Windows, `filesep` evaluates to `\` and, in a `*printf` statement, this can have unintended consequences (e.g. `\t` evaluates to the tab character

Since '/' works on all systems, replace all occurrences of `filesep` with `/` in the codebase

addpath does not deal well with relative path on older MATLABs.

Also shorten test names, because “testsuite_old_matlab” is too long and gets
truncated on the web interface.