1.2.0+dune

CHANGES:

• In manpage specification the new variable $(iname) substitutes the
  command invocation (from program name to subcommand) in bold (dbuenzli#168).
  This variable is now used in the default introduction of the EXIT STATUS
  section. Thanks to Ali Caglayan for suggesting.
• Fix manpage rendering when PAGER=less is set (dbuenzli#167).
• Plain text manpage rendering: fix broken handling of `Noblank.
  Thanks to Michael Richards and Reynir Björnsson for the report (dbuenzli#176).
• Fix install to directory with spaces (dbuenzli#172). Thanks to
  @ZSFactory for reporting and suggesting the fix.
• Fix manpage paging on Windows (dbuenzli#166). Thanks to Nicolás Ojeda Bär
  for the report and the solution.