Make naming of globals consistent

See merge request Dynare/reporting!8

In this version of Octave, “warning on” really enables all warnings (while this
was not the case in Octave 6, suprisingly; I think this used to be different
with even older Octave releases).

We must therefore avoid to reenable all warnings after having disabled a
problematic one.

It is now supported by the MATLAB editor (as of R2022a).

[skip ci]

It is called from top-level getMaxRange.m.

Closes: #18

Closes: #17

closes #12

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