ld.so.8: Minor rework of LD_DEBUG description

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man8/ld.so.8

@@ -395,21 +395,24 @@ one can observe all run-time function bindings.
 .TP
 .BR LD_DEBUG " (since glibc 2.1)"
 Output verbose debugging information about operation of the dynamic linker.
-If set to
-.IR all ,
-print all debugging information (except
-.IR statistics
-and
-.IR unused ;
-see below).
+The content of this variable is one of more of the following categories,
+separated by colons, commas, or (if the value is quoted) spaces:
+.RS
+.TP 12
+.I help
 Specifying
 .IR help
 in the value of this variable does not run the specified program,
 and displays a help message about which categories can be specified in this
 environment variable.
-The categories are:
-.RS
-.TP 12
+.TP
+.I all
+Print all debugging information (except
+.IR statistics
+and
+.IR unused ;
+see below).
+.TP
 .I bindings
 Display information about which definition each symbol is bound to.
 .TP
@@ -438,11 +441,6 @@ Determine unused DSOs.
 Display version dependencies.
 .RE
 .IP
-The value in
-.BR LD_DEBUG
-can specify multiple categories, separated by colons, commas,
-or (if the value is quoted) spaces.
-
 Since glibc 2.3.4,
 .B LD_DEBUG
 is ignored in secure-execution mode, unless the file