gdb/doc: add missing parentheses around prompt in some examples

While reading the manual for -info-os I noticed that the GDB prompt is
given as 'gdb' when it should really be '(gdb)'.  This is because the
prompt is created with: '@value{GDBP}'.

The GDBP variable (the GDB program name) is intended for use as the
prompt string (though this is not used consistently throughout the
manual), however it is normally used like '(@value{GDBP})', but in a
couple of places the enclosing parentheses are missing.

In this commit I do the following:

 - Change '@value{GDBP}' to '(@value{GDBP})' wherever the variable
   represents a prompt string.

 - Replaces '(gdb)' with '(@value{GDBP})' in one example where we are
   already using '(@value{GDBP})', this makes that one example
   consistent.

I have NOT:

 - Changed all instances of '(gdb)' with '(@value{GDBP})', this would
   be a huge change.

gdb/doc/ChangeLog:

	* gdb.texinfo (GDB/MI Miscellaneous Commands): Add missing
	parentheses to GDB prompt in example, and replace '(gdb)' with
	'(@value{GDBP})' in one example where the latter was already in
	use.

2 files changed, 12 insertions, 5 deletions

diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index 0b9b351..2482c54 100644
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,3 +1,10 @@
+2021-04-14  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* gdb.texinfo (GDB/MI Miscellaneous Commands): Add missing
+	parentheses to GDB prompt in example, and replace '(gdb)' with
+	'(@value{GDBP})' in one example where the latter was already in
+	use.
+
 2021-03-29  Luis Machado  <luis.machado@linaro.org>
 
 	* gdb.textinfo (Memory Tagging): Make it a @section.
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 7dbffb6..51e1c64 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -36513,7 +36513,7 @@ and only if there is a corresponding executable file.
 @subheading Example
 
 @smallexample
-@value{GDBP}
+(@value{GDBP})
 -list-thread-groups
 ^done,groups=[@{id="17",type="process",pid="yyy",num_children="2"@}]
 -list-thread-groups 17
@@ -36561,7 +36561,7 @@ When run on a @sc{gnu}/Linux system, the output will look something
 like this:
 
 @smallexample
-@value{GDBP}
+(@value{GDBP})
 -info-os
 ^done,OSDataTable=@{nr_rows="10",nr_cols="3",
 hdr=[@{width="10",alignment="-1",col_name="col0",colhdr="Type"@},
@@ -36587,7 +36587,7 @@ body=[item=@{col0="cpus",col1="Listing of all cpus/cores on the system",
             col2="Sockets"@},
       item=@{col0="threads",col1="Listing of all threads",
             col2="Threads"@}]
-@value{GDBP}
+(@value{GDBP})
 -info-os processes
 ^done,OSDataTable=@{nr_rows="190",nr_cols="4",
 hdr=[@{width="10",alignment="-1",col_name="col0",colhdr="pid"@},
@@ -36600,7 +36600,7 @@ body=[item=@{col0="1",col1="root",col2="/sbin/init",col3="0"@},
       ...
       item=@{col0="26446",col1="stan",col2="bash",col3="0"@},
       item=@{col0="28152",col1="stan",col2="bash",col3="1"@}]@}
-(gdb)
+(@value{GDBP})
 @end smallexample
 
 (Note that the MI output here includes a @code{"Title"} column that
@@ -36628,7 +36628,7 @@ thread group corresponding to the new inferior.
 @subheading Example
 
 @smallexample
-@value{GDBP}
+(@value{GDBP})
 -add-inferior
 ^done,inferior="i3"
 @end smallexample