Use the builtin $signals array
[Fix #399] Only enable the main syntax highlighter
Update external completions
Update external syntax-highlighting
Update external history-substring-search
Remove no longer necessary key bindings
Fix misspellings of the word bellow in READMEs
Wrap errant long line in git module README
Correct typos in git module README
[Fix #403] Display accented characters properly
Merge branch 'upstream'

* upstream:
  [Fix #403] Display accented characters properly
  Correct typos in git module README
  Wrap errant long line in git module README
  Fix misspellings of the word bellow in READMEs
  Remove no longer necessary key bindings
  Update external history-substring-search
  Update external syntax-highlighting
  Update external completions
  [Fix #399] Only enable the main syntax highlighter
  Use the builtin $signals array