treewide: fix typos in comments (#413240)

lib/attrsets.nix

@@ -1747,7 +1747,7 @@ rec {
 
   /**
     Get the first of the `outputs` provided by the package, or the default.
-    This function is alligned with `_overrideFirst()` from the `multiple-outputs.sh` setup hook.
+    This function is aligned with `_overrideFirst()` from the `multiple-outputs.sh` setup hook.
     Like `getOutput`, the function is idempotent.
 
     # Inputs

lib/fixed-points.nix

@@ -389,7 +389,7 @@ rec {
 
       extensions = composeManyExtensions [ overlayA overlayB ];
 
-      # Caluculate the fixed point of all composed overlays.
+      # Calculate the fixed point of all composed overlays.
       fixedpoint = lib.fix (lib.extends extensions original );
 
     in fixedpoint

lib/options.nix

@@ -404,7 +404,7 @@ rec {
     ```nix
     myType = mkOptionType {
       name = "myType";
-      merge = mergeDefaultOption; # <- This line is redundant. It is the default aready.
+      merge = mergeDefaultOption; # <- This line is redundant. It is the default already.
     };
     ```
 
@@ -470,7 +470,7 @@ rec {
     args@{
       message,
       # WARNING: the default merge function assumes that the definition is a valid (option) value. You MUST pass a merge function if the return value needs to be
-      #   - type checked beyond what .check does (which should be very litte; only on the value head; not attribute values, etc)
+      #   - type checked beyond what .check does (which should be very little; only on the value head; not attribute values, etc)
       #   - if you want attribute values to be checked, or list items
       #   - if you want coercedTo-like behavior to work
       merge ? loc: defs: (head defs).value,

lib/types.nix

@@ -75,7 +75,7 @@ let
     if pos == null then "" else " at ${pos.file}:${toString pos.line}:${toString pos.column}";
 
   # Internal functor to help for migrating functor.wrapped to functor.payload.elemType
-  # Note that individual attributes can be overriden if needed.
+  # Note that individual attributes can be overridden if needed.
   elemTypeFunctor =
     name:
     { elemType, ... }@payload: