I like a feature of Micro$oft Word.
If you choosed to show
all caracters,
when a word overtakes the line,
then it is putted at the beginning
of the following line
and the space between the last word
of the previous line
and the word moved appears at the end
of the previous line.

In OOW, even if we choosed
to see all caracters,
spaces ending lines are hidden.
Inserting a word will result sometimes
to let a bad number of sucessive spaces.
Indeed, if you insert a word in the first line,
then the last word of this line could on its turn move
to the following line
and leave several spaces or no one
between the 2 words that moved
to the last line.
I hope I'm clear enought.
If not, don't hesitate
to ask me to explain a point again.