perf report: Fix misleading help message about --demangle

The wrong help message may mislead users. This commit fixes it.

Fixes: 328ccda ("perf report: Add --no-demangle option")
Reviewed-by: Namhyung Kim <[email protected]>
Signed-off-by: Jiachen Zhang <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: zhangjaycee

tools/perf/builtin-report.c

@@ -1420,7 +1420,7 @@ int cmd_report(int argc, const char **argv)
 	OPT_STRING(0, "addr2line", &addr2line_path, "path",
 		   "addr2line binary to use for line numbers"),
 	OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
-		    "Disable symbol demangling"),
+		    "Symbol demangling. Enabled by default, use --no-demangle to disable."),
 	OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
 		    "Enable kernel symbol demangling"),
 	OPT_BOOLEAN(0, "mem-mode", &report.mem_mode, "mem access profile"),