Make .config.old easier to discover

Mention that the old version of an overwritten configuration file is
saved to <filename>.old in a few different places, to make it easier to
discover.

1 files changed, 3 insertions, 0 deletions

diff --git a/guiconfig.py b/guiconfig.py
index 0ff5fa0..c709c4e 100755
--- a/guiconfig.py
+++ b/guiconfig.py
@@ -41,6 +41,9 @@ as a command-line argument. With no argument, it defaults to "Kconfig".
 The KCONFIG_CONFIG environment variable specifies the .config file to load (if
 it exists) and save. If KCONFIG_CONFIG is unset, ".config" is used.
 
+When overwriting a configuration file, the old version is saved to
+<filename>.old (e.g. .config.old).
+
 $srctree is supported through Kconfiglib.
 """