Docs: add info about the direction arrow requirements
Direction arrows must be a separate word with a space
between arrow and the pin name

Signed-off-by: John Thornton <jthornton@gnipsel.com>
Docs: fix spello

Signed-off-by: John Thornton <jthornton@gnipsel.com>
French doc: add info about the direction arrow requirements

Signed-off-by: Francis Tisserant <tissf@free.fr>
French doc: cleaning

Signed-off-by: Francis Tisserant <tissf@free.fr>
Merge remote-tracking branch 'origin/v2.5_branch' into 2.6