lib/modules: Change type error to be gramatically nicer

Before:
  <x> is not a integer between 0 and 100 (inclusively).
(notice that “a” is wrong, it should be “an”)
Now:
  <x> is not of type `integer between 0 and 100 (inclusively)'.

This sounds a bit more formal, but circumvents the grammatical problems.
Multi-word type descriptions are also easier to see.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/modules.nix b/lib/modules.nix
index eb2f89684f3..8c3584bbbf4 100644
--- a/lib/modules.nix
+++ b/lib/modules.nix
@@ -338,7 +338,7 @@ rec {
     # Type-check the remaining definitions, and merge them.
     mergedValue = foldl' (res: def:
       if type.check def.value then res
-      else throw "The option value `${showOption loc}' in `${def.file}' is not a ${type.description}.")
+      else throw "The option value `${showOption loc}' in `${def.file}' is not of type `${type.description}'.")
       (type.merge loc defsFinal) defsFinal;
 
     isDefined = defsFinal != [];