* man/groff.man: Document `\_'.

* doc/groff.texinfo: Ditto.
Remove references to `\@' which isn't a valid escape sequence in
groff.

1 files changed, 9 insertions, 7 deletions

diff --git a/doc/groff.texinfo b/doc/groff.texinfo
index 29b4febb..06b43c42 100644
--- a/doc/groff.texinfo
+++ b/doc/groff.texinfo
@@ -5715,7 +5715,6 @@ possible, but it is better not to use this feature to avoid confusion.
 @cindex @code{\_}, used as delimiter
 @cindex @code{\!}, used as delimiter
 @cindex @code{\?}, used as delimiter
-@cindex @code{\@@}, used as delimiter
 @cindex @code{\)}, used as delimiter
 @cindex @code{\/}, used as delimiter
 @cindex @code{\,}, used as delimiter
@@ -5741,9 +5740,9 @@ The following escapes sequences (which are handled similarly to
 characters since they don't take a parameter) are also allowed as
 delimiters: @code{\%}, @w{@samp{\ }}, @code{\|}, @code{\^}, @code{\@{},
 @code{\@}}, @code{\'}, @code{\`}, @code{\-}, @code{\_}, @code{\!},
-@code{\?}, @code{\@@}, @code{\)}, @code{\/}, @code{\,}, @code{\&},
-@code{\:}, @code{\~}, @code{\0}, @code{\a}, @code{\c}, @code{\d},
-@code{\e}, @code{\E}, @code{\p}, @code{\r}, @code{\t}, and @code{\u}.
+@code{\?}, @code{\)}, @code{\/}, @code{\,}, @code{\&}, @code{\:},
+@code{\~}, @code{\0}, @code{\a}, @code{\c}, @code{\d}, @code{\e},
+@code{\E}, @code{\p}, @code{\r}, @code{\t}, and @code{\u}.
 Again, don't use these if possible.
 
 @cindex @code{\A}, allowed delimiters
@@ -5821,14 +5820,13 @@ The space, tab, and newline characters.
 @cindex @code{\-}, used as delimiter
 @cindex @code{\_}, used as delimiter
 @cindex @code{\!}, used as delimiter
-@cindex @code{\@@}, used as delimiter
 @cindex @code{\/}, used as delimiter
 @cindex @code{\c}, used as delimiter
 @cindex @code{\e}, used as delimiter
 @cindex @code{\p}, used as delimiter
 All escape sequences except @code{\%}, @code{\:}, @code{\@{}, @code{\@}},
-@code{\'}, @code{\`}, @code{\-}, @code{\_}, @code{\!}, @code{\@@},
-@code{\/}, @code{\c}, @code{\e}, and @code{\p}.
+@code{\'}, @code{\`}, @code{\-}, @code{\_}, @code{\!}, @code{\/},
+@code{\c}, @code{\e}, and @code{\p}.
 @end itemize
 
 @cindex printing backslash (@code{\\}, @code{\e}, @code{\E}, @code{\[rs]})
@@ -9391,6 +9389,10 @@ This is a backslash followed by @acronym{ASCII} character @code{0x60}
 This is the same as @code{\[-]}, the minus sign in the current font.
 @endDefesc
 
+@Defesc {\\_, , , }
+This is the same as @code{\[ul]}, the underline character.
+@endDefesc
+
 @Defreq {cflags, n c1 c2 @dots{}}
 @cindex glyph properties (@code{cflags})
 @cindex character properties (@code{cflags})