[PATCH] doc: clarify the pr --page-width descriptions

[Pádraig Brady]

* doc/coreutils.texi (pr invocation): Clarify that -w or -W
will be rounded down so that each column has the same width.
Adjust the wording for -W, to avoid the implication that the
width of -S is insignificant to the page width.
* src/pr.c (usage): Add a period to avoid ambiguity in
the man page output.
---
 doc/coreutils.texi |   15 +++++++++------
 src/pr.c           |    3 ++-
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index b21a4fd..12002fc 100644
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -2878,8 +2878,10 @@ Print nonprinting characters in octal backslash notation.
 @opindex -w
 @opindex --width
 Set page width to @var{page_width} characters for multiple text-column
-output only (default for @var{page_width} is 72).  @option{-s[CHAR]} turns
-off the default page width and any line truncation and column alignment.
+output only (default for @var{page_width} is 72).  The specified
+@var{page_width} is rounded down so that columns have equal width.
+@option{-s[CHAR]} turns off the default page width and any line truncation
+and column alignment.
 Lines of full length are merged, regardless of the column options
 set.  No @var{page_width} setting is possible with single column output.
 A POSIX-compliant formulation.
@@ -2888,12 +2890,13 @@ A POSIX-compliant formulation.
 @itemx --page_width=@var{page_width}
 @opindex -W
 @opindex --page_width
-Set the page width to @var{page_width} characters.  That's valid with and
-without a column option.  Text lines are truncated, unless @option{-J}
-is used.  Together with one of the three column options
+Set the page width to @var{page_width} characters, honored with and
+without a column option.  With a column option, the specified @var{page_width}
+is rounded down so that columns have equal width.  Text lines are truncated,
+unless @option{-J} is used. Together with one of the three column options
 (@option{-@var{column}}, @option{-a -@var{column}} or @option{-m}) column
 alignment is always used.  The separator options @option{-S} or @option{-s}
-don't affect the @option{-W} option.  Default is 72 characters.  Without
+don't disable the @option{-W} option.  Default is 72 characters.  Without
 @option{-W @var{page_width}} and without any of the column options NO line
 truncation is used (defined to keep downward compatibility and to meet
 most frequent tasks).  That's equivalent to @option{-W 72 -J}@.  The header
diff --git a/src/pr.c b/src/pr.c
index 3f9d1de..1515b4a 100644
--- a/src/pr.c
+++ b/src/pr.c
@@ -2820,7 +2820,8 @@ Paginate or columnate FILE(s) for printing.\n\
       fputs (_("\
   -s[CHAR], --separator[=CHAR]\n\
                     separate columns by a single character, default for CHAR\n\
-                    is the <TAB> character without -w and \'no char\' with 
-w\n\
+                    is the <TAB> character without -w and \'no char\' with -w.\
+\n\
                     -s[CHAR] turns off line truncation of all 3 column\n\
                     options (-COLUMN|-a -COLUMN|-m) except -w is set\n\
 "), stdout);
-- 
1.7.7.6