[src] In setGridMesher, also update symmetry of temp_mesh_grid_ member
[doc] Remove spaces before punctuation signs
[doc] Replace $text$ by \texttt{text} or \textit{text}

Dollar signs must not be used to typeset text, only maths.
[doc] Remove some subsubsections from the table of contents
[doc] Explain the variable change in FFT 1D
[doc] Improve FFT 2D section
[doc] Remove dummy \left. \right. delimiters
[doc] Proofreading