Update pg command help message

src/messages.h

@@ -820,7 +820,7 @@ If set to any positive integer greater than 1, run the pager whenever\n\
 the amount of files in the current directory is greater than or equal to\n\
 this value (say, 1000). 1 amounts to 'on' and 0 to 'off'.\n\n\
 Set to 'once' to run the pager only once. Since this is the default\n\
-value, running 'pg once' is the same as running just 'pg'.\n\n\
+parameter, 'pg' (with no parameter) is equivalent to 'pg once'.\n\n\
 Note: You can also try the 'pager' plugin running 'gg'."
 
 #define PC_USAGE "Interactively edit files permissions\n\n\