nm: update page (#7758)

pages/common/nm.md

@@ -1,19 +1,20 @@
 # nm
 
 > List symbol names in object files.
+> More information: <https://manned.org/nm>.
 
 - List global (extern) functions in a file (prefixed with T):
 
-`nm -g {{file.o}}`
+`nm -g {{path/to/file.o}}`
 
 - List only undefined symbols in a file:
 
-`nm -u {{file.o}}`
+`nm -u {{path/to/file.o}}`
 
 - List all symbols, even debugging symbols:
 
-`nm -a {{file.o}}`
+`nm -a {{path/to/file.o}}`
 
 - Demangle C++ symbols (make them readable):
 
-`nm --demangle {{file.o}}`
+`nm --demangle {{path/to/file.o}}`