Description on bdlb::Print indent methods reworded.
Description on bdlb::Print indent methods reworded.

Describe undefined behavior and fix example of space character.
Also make the two descriptions more equal in their wording.

Signed-off-by: Frank Birbacher <89dd542fcb505d7d7d1e03149a636e997aa51eca@bloomberg.net>

bloomberg/bde,che2/bde,bloomberg/bde,bloomberg/bde,bloomberg/bde,bloomberg/bde,che2/bde,che2/bde,che2/bde