diff --git a/src/ast/stmt.rs b/src/ast/stmt.rs
index c634bfc1..4a5ebcbf 100644
--- a/src/ast/stmt.rs
+++ b/src/ast/stmt.rs
@@ -216,7 +216,7 @@ impl IntoIterator for RangeCase {
 }
 
 impl RangeCase {
-    /// Is the range empty?
+    /// Returns `true` if the range contains no items.
     #[inline(always)]
     #[must_use]
     pub fn is_empty(&self) -> bool {
@@ -356,7 +356,7 @@ impl StmtBlock {
             span: Span::new(pos, pos),
         }
     }
-    /// Is this statements block empty?
+    /// Returns `true` if this statements block contains no statements.
     #[inline(always)]
     #[must_use]
     pub fn is_empty(&self) -> bool {
diff --git a/src/module/mod.rs b/src/module/mod.rs
index 61e2f4c7..fb3e47ab 100644
--- a/src/module/mod.rs
+++ b/src/module/mod.rs
@@ -591,7 +591,7 @@ impl Module {
         self.custom_types.get(key)
     }
 
-    /// Is the [`Module`] empty?
+    /// Returns `true` if this [`Module`] contains no items.
     ///
     /// # Example
     ///
diff --git a/src/module/resolvers/collection.rs b/src/module/resolvers/collection.rs
index aa39329f..7aab4bd0 100644
--- a/src/module/resolvers/collection.rs
+++ b/src/module/resolvers/collection.rs
@@ -86,7 +86,7 @@ impl ModuleResolversCollection {
         self.0.clear();
         self
     }
-    /// Is this [`ModuleResolversCollection`] empty?
+    /// Returns `true` if this [`ModuleResolversCollection`] contains no module resolvers.
     #[inline(always)]
     #[must_use]
     pub fn is_empty(&self) -> bool {
diff --git a/src/module/resolvers/stat.rs b/src/module/resolvers/stat.rs
index 3f556db2..b2d418c7 100644
--- a/src/module/resolvers/stat.rs
+++ b/src/module/resolvers/stat.rs
@@ -98,7 +98,7 @@ impl StaticModuleResolver {
         self.0.clear();
         self
     }
-    /// Is this [`StaticModuleResolver`] empty?
+    /// Returns `true` if this [`StaticModuleResolver`] contains no module resolvers.
     #[inline(always)]
     #[must_use]
     pub fn is_empty(&self) -> bool {
diff --git a/src/types/interner.rs b/src/types/interner.rs
index da93de3c..8ce63284 100644
--- a/src/types/interner.rs
+++ b/src/types/interner.rs
@@ -63,23 +63,21 @@ impl StringsInterner<'_> {
     /// Get an identifier from a text string, adding it to the interner if necessary.
     #[inline(always)]
     #[must_use]
-    pub fn get<T: AsRef<str> + Into<ImmutableString>>(&mut self, text: T) -> ImmutableString {
+    pub fn get<S: AsRef<str> + Into<ImmutableString>>(&mut self, text: S) -> ImmutableString {
         self.get_with_mapper(|s| s.into(), text)
     }
 
     /// Get an identifier from a text string, adding it to the interner if necessary.
     #[inline]
     #[must_use]
-    pub fn get_with_mapper<T: AsRef<str> + Into<ImmutableString>>(
+    pub fn get_with_mapper<S: AsRef<str>>(
         &mut self,
-        mapper: fn(T) -> ImmutableString,
-        text: T,
+        mapper: fn(S) -> ImmutableString,
+        text: S,
     ) -> ImmutableString {
         let key = text.as_ref();
 
-        // Do not intern long strings or numbers
-        if key.len() > MAX_STRING_LEN || key.bytes().all(|c| c == b'.' || (c >= b'0' && c <= b'9'))
-        {
+        if key.len() > MAX_STRING_LEN {
             return mapper(text);
         }
 
@@ -133,7 +131,7 @@ impl StringsInterner<'_> {
         self.strings.len()
     }
 
-    /// Are there no interned strings?
+    /// Returns `true` if there are no interned strings.
     #[inline(always)]
     #[must_use]
     pub fn is_empty(&self) -> bool {
diff --git a/src/types/scope.rs b/src/types/scope.rs
index 8939c94b..46dd1d1f 100644
--- a/src/types/scope.rs
+++ b/src/types/scope.rs
@@ -214,7 +214,7 @@ impl Scope<'_> {
     pub fn len(&self) -> usize {
         self.values.len()
     }
-    /// Is the [`Scope`] empty?
+    /// Returns `true` if this [`Scope`] contains no variables.
     ///
     /// # Example
     ///