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Tweak markup of quoted strings and characters: use Dq instead of enclosing

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strings in ``obsolete quotes''. Use Li and Ql where appropriate.
This commit is contained in:
Tim J. Robbins 2004-07-23 06:06:58 +00:00
parent 9b5f005228
commit 26bdc1d12e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=132574
1 changed files with 44 additions and 12 deletions
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56
usr.bin/tr/tr.1
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@ -209,18 +209,26 @@ Class names are:
.\" and vice-versa) is specified in the same relative position in
.\" .Ar string1 .
.\" .Pp
When ``[:lower:]'' appears in
When
.Dq Li [:lower:]
appears in
.Ar string1
and ``[:upper:]'' appears in the same relative position in
and
.Dq Li [:upper:]
appears in the same relative position in
.Ar string2 ,
it represents the characters pairs from the
.Dv toupper
mapping in the
.Ev LC_CTYPE
category of the current locale.
When ``[:upper:]'' appears in
When
.Dq Li [:upper:]
appears in
.Ar string1
and ``[:lower:]'' appears in the same relative position in
and
.Dq Li [:lower:]
appears in the same relative position in
.Ar string2 ,
it represents the characters pairs from the
.Dv tolower
@ -326,23 +334,45 @@ and
.Ql "A-Z" .
.Pp
System V has historically implemented character ranges using the syntax
``[c-c]'' instead of the ``c-c'' used by historic
.Dq Li [c-c]
instead of the
.Dq Li c-c
used by historic
.Bx
implementations and
standardized by POSIX.
System V shell scripts should work under this implementation as long as
the range is intended to map in another range, i.e., the command
``tr [a-z] [A-Z]'' will work as it will map the ``['' character in
.Dq Li "tr [a-z] [A-Z]"
will work as it will map the
.Ql \&[
character in
.Ar string1
to the ``['' character in
to the
.Ql \&[
character in
.Ar string2 .
However, if the shell script is deleting or squeezing characters as in
the command ``tr -d [a-z]'', the characters ``['' and ``]'' will be
the command
.Dq Li "tr -d [a-z]" ,
the characters
.Ql \&[
and
.Ql \&]
will be
included in the deletion or compression list which would not have happened
under a historic System V implementation.
Additionally, any scripts that depended on the sequence ``a-z'' to
represent the three characters ``a'', ``-'' and ``z'' will have to be
rewritten as ``a\e-z''.
Additionally, any scripts that depended on the sequence
.Dq Li a-z
to
represent the three characters
.Ql a ,
.Ql \&-
and
.Ql z
will have to be
rewritten as
.Dq Li a\e-z .
.Pp
The
.Nm
@ -373,7 +403,9 @@ has less characters than
.Ar string1
is permitted by POSIX but is not required.
Shell scripts attempting to be portable to other POSIX systems should use
the ``[#*]'' convention instead of relying on this behavior.
the
.Dq Li [#*]
convention instead of relying on this behavior.
The
.Fl u
option is an extension to the