gdb, doc: correct argument description for info connections/inferiors

It said for 'info inferiors' and 'info connections' that the argument
could be 'a space separated list of inferior numbers' which is correct
but incomplete.  In fact the arguments can be any space separated
combination of numbers and (ascending) ranges.

The beginning of the section now describes the ID list as a new keyword.

Co-Authored-By: Christina Schimpe <christina.schimpe@intel.com>

1 files changed, 13 insertions, 6 deletions

diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 2d5358a..45a0580 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -3216,6 +3216,15 @@ embedded targets may have several inferiors running in different parts
 of a single address space.  Each inferior may in turn have multiple
 threads running in it.
 
+@cindex ID list
+The commands @code{info inferiors} and @code{info connections}, which will be
+introduced below, accept a space-separated @dfn{ID list} as their argument
+specifying one or more elements on which to operate.  A list element can be
+either a single non-negative number, like @samp{5}, or an ascending range of
+such numbers, like @samp{5-7}.  A list can consist of any combination of such
+elements, even duplicates or overlapping ranges are valid.  E.g.@:
+@samp{1 4-6 5 4-4} or @samp{1 2 4-7}.
+
 To find out what inferiors exist at any moment, use @w{@code{info
 inferiors}}:
 
@@ -3223,9 +3232,8 @@ inferiors}}:
 @kindex info inferiors [ @var{id}@dots{} ]
 @item info inferiors
 Print a list of all inferiors currently being managed by @value{GDBN}.
-By default all inferiors are printed, but the argument @var{id}@dots{}
--- a space separated list of inferior numbers -- can be used to limit
-the display to just the requested inferiors.
+By default all inferiors are printed, but the ID list @var{id}@dots{} can be
+used to limit the display to just the requested inferiors.
 
 @value{GDBN} displays for each inferior (in this order):
 
@@ -3284,9 +3292,8 @@ To find out what open target connections exist at any moment, use
 @kindex info connections [ @var{id}@dots{} ]
 @item info connections
 Print a list of all open target connections currently being managed by
-@value{GDBN}.  By default all connections are printed, but the
-argument @var{id}@dots{} -- a space separated list of connections
-numbers -- can be used to limit the display to just the requested
+@value{GDBN}.  By default all connections are printed, but the ID list
+@var{id}@dots{} can be used to limit the display to just the requested
 connections.
 
 @value{GDBN} displays for each connection (in this order):