(integer :tag "Number of characters")
(float :tag "Fraction of window")))
-(defcustom notmuch-hello-thousands-separator ","
+(defcustom notmuch-hello-thousands-separator " "
"The string used as a thousands separator.
-Typically \",\" in the US and UK and \".\" in Europe."
+Typically \",\" in the US and UK and \".\" or \" \" in Europe.
+The latter is recommended in the SI/ISO 31-0 standard and by the
+International Bureau of Weights and Measures."
:group 'notmuch
:type 'string)