scratch/long-lines-cleanup updated (c0b9530862c -> 1e3a66df459)

[Gregory Heytings]

ghe pushed a change to branch scratch/long-lines-cleanup.

      from  c0b9530862c Another final fix to last changes
       new  f0f08eeb05c Fix the return type of 'labeled_restrictions_get_bound'
       new  1e3a66df459 Add an assertion in, and a commentary for, 
'get_nearby_bol_pos'


Summary of changes:
 src/editfns.c | 83 ++++++++++++++++++++++++++++++-----------------------------
 src/xdisp.c   | 12 ++++++---
 2 files changed, 51 insertions(+), 44 deletions(-)