Fix typos and documentation
This MR groups several smaller changes, one per commit:
- Fixes documentation related to Nedelec function space (broken links, etc.).
- Applies suggestion from comment "this can be changed to Index once Index is same as Index".
- Fixes a typo in a comment.
- Renames the functions
getOrientattionInNeighboringMacro(Cell|Face)
togetOrientationInNeighboringMacro(Cell|Face)
and reformats the affected files.