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_des b/man/lvextend.8_des
index f1e02d6b5..eafd24755 100644
--- a/man/lvextend.8_des
+++ b/man/lvextend.8_des
@@ -2,11 +2,11 @@ lvextend extends the size of an LV. This requires allocating logical
 extents from the VG's free physical extents. If the extension adds a new
 LV segment, the new segment will use the existing segment type of the LV.
 
-Extending a copy\-on\-write snapshot LV adds space for COW blocks.
+Extending a copy-on-write snapshot LV adds space for COW blocks.
 
 Use \fBlvconvert\fP(8) to change the number of data images in a RAID or
 mirrored LV.
 
-In the usage section below, \fB\-\-size\fP \fISize\fP can be replaced
-with \fB\-\-extents\fP \fINumber\fP.  See both descriptions
+In the usage section below, \fB--size\fP \fISize\fP can be replaced
+with \fB--extents\fP \fINumber\fP.  See both descriptions
 the options section.