feat: correct lo and behold, and jack-o'-lantern

harper-core/src/linting/phrase_corrections/mod.rs

@@ -766,6 +766,13 @@ pub fn lint_group() -> LintGroup {
             "Corrects non-standard variants of `low-hanging fruit`.",
             LintKind::Usage
         ),
+        "LoAndBehold" => (
+            ["low and behold"],
+            ["lo and behold"],
+            "The correct form is `lo and behold`.",
+            "Corrects non-standard variant of `lo and behold`.",
+            LintKind::Malapropism
+        ),
         "ManagerialReins" => (
             ["managerial reigns"],
             ["managerial reins"],

harper-core/src/linting/phrase_set_corrections/mod.rs

@@ -252,6 +252,22 @@ pub fn lint_group() -> LintGroup {
             "`Invest` is traditionally followed by 'in,' not `into.`",
             LintKind::Usage
         ),
+        "JackOLantern" => (
+            &[
+                // Singular
+                ("jack o lantern", "jack o'lantern"),
+                ("jack olantern", "jack o'lantern"),
+                ("jackolantern", "jack-o'-lantern"),
+                ("jack-o-lantern", "jack-o'-lantern"),
+                // Plural
+                ("jack o lanterns", "jack o'lanterns"),
+                ("jack olantern", "jack o'lanterns"),
+                ( "jackolanterns", "jack-o'-lanterns"),
+                ( "jack-o-lanterns", "jack-o'-lanterns"),
+            ],
+            "Use contraction when referring to `jack-o'-lantern`",
+            LintKind::Punctuation
+        ),
         "MakeDoWith" => (
             &[
                 ("make due with", "make do with"),