Man writer: improvements to code and code blocks.

The aim here (see #9020) is to produce more standard and more
portable man pages.  To that end:

- We revert the fanciness introduced in #7506, which employs a
  custom font name V and a macro that makes this act like boldface
  in a terminal and monospace in other formats.  Unfortunately,
  this code uses a mechanism that is not portable (and does not
  work in mandoc).

- Instead of using V for inline code, we simply use CR.
  Note that `\f[CR]` is emitted instead of plain `\f[C]`,
  because there is no C font in man.  (This produces warnings
  in recent versions of groff.)

- For code blocks, we now use the `.EX` and `.EE` macros,
  together with `.IP` for spacing and indentation.  This gives
  more standard code that can be better interpreted e.g. by mandoc.

2 files changed, 4 insertions, 4 deletions

diff --git a/test/command/3568.md b/test/command/3568.md
index a6817f4c6..ffc1daada 100644
--- a/test/command/3568.md
+++ b/test/command/3568.md
@@ -10,7 +10,7 @@ normal `code` normal.
 normal \f[I]italic \f[BI]bold in the middle\f[I] only italic\f[R]
 normal.
 .PP
-normal \f[B]bold \f[VB]code\f[B] more bold\f[R] normal.
+normal \f[B]bold \f[CB]code\f[B] more bold\f[R] normal.
 .PP
-normal \f[V]code\f[R] normal.
+normal \f[CR]code\f[R] normal.
 ```
diff --git a/test/command/5620.md b/test/command/5620.md
index cb2635bf0..371a64864 100644
--- a/test/command/5620.md
+++ b/test/command/5620.md
@@ -4,6 +4,6 @@
 :   Write output to *OUTFILE* instead of `stdout`(3)
 ^D
 .TP
-\f[V]-o\f[R], \f[V]--output=\f[R]\f[I]OUTFILE\f[R]
-Write output to \f[I]OUTFILE\f[R] instead of \f[V]stdout\f[R](3)
+\f[CR]-o\f[R], \f[CR]--output=\f[R]\f[I]OUTFILE\f[R]
+Write output to \f[I]OUTFILE\f[R] instead of \f[CR]stdout\f[R](3)
 ```