man-generator/man/help: simplify hyphen escaping

Commits a29bb6a14b5e920092495fb9a1623e527d22daac
    ... 5c199d99f4dc9911d62673baba7643ea649ffe64
narrowed down on addressing the escaping of hyphens
in the dynamic creation of manuals whilst avoiding
them in creating help texts.  This lead to a sequence
of slipping through hyphens adrressed by additional
patches in aforementioned commit series.

On the other hand, postprocessing dynamically man-generator
created and statically provided manuals catches all hyphens
in need of escaping.

Changes:
- revert the above commits whilst keeping man-generator
  streamlining and the detection of any '\' when generating
  help texts in order to avoid escapes to slip in

- Dynamically escape hyphens in manaual pages using sed(1)
  in the respective Makefile targets

- remove any manually added escaping on hyphens from any
  static manual sources or headers

1 files changed, 3 insertions, 3 deletions

diff --git a/man/lvextend.8_end b/man/lvextend.8_end
index aebe6d8b1..af24d4f80 100644
--- a/man/lvextend.8_end
+++ b/man/lvextend.8_end
@@ -1,14 +1,14 @@
 .SH EXAMPLES
 Extend the size of an LV by 54MiB, using a specific PV.
 .br
-.B lvextend \-L +54 vg01/lvol10 /dev/sdk3
+.B lvextend -L +54 vg01/lvol10 /dev/sdk3
 
 Extend the size of an LV by the amount of free
 space on PV /dev/sdk3. This is equivalent to specifying
-"\-l +100%PVS" on the command line.
+"-l +100%PVS" on the command line.
 .br
 .B lvextend vg01/lvol01 /dev/sdk3
 
 Extend an LV by 16MiB using specific physical extents.
 .br
-.B lvextend \-L+16m vg01/lvol01 /dev/sda:8\-9 /dev/sdb:8\-9
+.B lvextend -L+16m vg01/lvol01 /dev/sda:8-9 /dev/sdb:8-9