fix spelling mistakes reported by Debian's lintian tool

src/libexpr/primops.cc

@@ -1269,7 +1269,7 @@ static RegisterPrimOp primop_derivationStrict(RegisterPrimOp::Info {
    substituted by the corresponding output path at build time. For
    example, 'placeholder "out"' returns the string
    /1rz4g4znpzjwh1xymhjpm42vipw92pr73vdgl6xs1hycac8kf2n9. At build
-   time, any occurence of this string in an derivation attribute will
+   time, any occurrence of this string in an derivation attribute will
    be replaced with the concrete path in the Nix store of the output
    ‘out’. */
 static void prim_placeholder(EvalState & state, const Pos & pos, Value * * args, Value & v)
@@ -2279,7 +2279,7 @@ static RegisterPrimOp primop_removeAttrs({
 /* Builds a set from a list specifying (name, value) pairs.  To be
    precise, a list [{name = "name1"; value = value1;} ... {name =
    "nameN"; value = valueN;}] is transformed to {name1 = value1;
-   ... nameN = valueN;}.  In case of duplicate occurences of the same
+   ... nameN = valueN;}.  In case of duplicate occurrences of the same
    name, the first takes precedence. */
 static void prim_listToAttrs(EvalState & state, const Pos & pos, Value * * args, Value & v)
 {

src/libstore/globals.hh

@@ -970,7 +970,7 @@ public:
     Setting<std::string> commitLockFileSummary{
         this, "", "commit-lockfile-summary",
         R"(
-          The commit summary to use when commiting changed flake lock files. If
+          The commit summary to use when committing changed flake lock files. If
           empty, the summary is generated based on the action performed.
         )"};
 };

src/nix/develop.md

@@ -55,7 +55,7 @@ R""(
   # nix develop /tmp/my-build-env
   ```
 
-* Replace all occurences of the store path corresponding to
+* Replace all occurrences of the store path corresponding to
   `glibc.dev` with a writable directory:
 
   ```console

src/nix/nix.md

@@ -76,7 +76,7 @@ the Nix store. Here are the recognised types of installables:
     
     Note that the search will only include files indexed by git. In particular, files
     which are matched by `.gitignore` or have never been `git add`-ed will not be
-    available in the flake. If this is undesireable, specify `path:<directory>` explicitly;
+    available in the flake. If this is undesirable, specify `path:<directory>` explicitly;
     
     For example, if `/foo/bar` is a git repository with the following structure:
     ```

src/nix/realisation/info.md

@@ -1,7 +1,7 @@
 R"MdBoundary(
 # Description
 
-Display some informations about the given realisation
+Display some information about the given realisation
 
 # Examples