Merge #987

987: minor typo fix r=hgrecco a=willstott101

This is probably a pointlessly small change, but I noticed this typo whilst looking at the definitions.

Co-authored-by: Will Stott <willstott101@gmail.com>

pint/default_en.txt

@@ -36,7 +36,7 @@
 #     [density] = [mass] / [volume]
 #
 # Note that primary dimensions don't need to be declared; they can be
-# defined or the first time in a unit definition.
+# defined for the first time in a unit definition.
 # E.g. see below `meter = [length]`
 #
 #