Chore: Fix some typos (Probably only part 1)

Author: xFrednet

marker_api/src/context.rs

@@ -198,7 +198,7 @@ impl<'ast> AstContext<'ast> {
     /// ```
     ///
     /// This will create the same help message as in example 2, but it will be faster
-    /// if the lint is enabled. The emitted message would look like this:
+    /// if the lint is allowed. The emitted message would look like this:
     /// ```text
     ///  warning: <lint message>
     ///  --> path/file.rs:1:1

marker_api/src/diagnostic.rs

@@ -48,7 +48,7 @@ impl<'ast> DiagnosticBuilder<'ast> {
         }
     }
 
-    /// This function sets the main message of this diagnostic message.
+    /// This function sets the main message of the created diagnostic.
     ///
     /// From rustc a lint emission would look like this:
     /// ```text
@@ -66,8 +66,8 @@ impl<'ast> DiagnosticBuilder<'ast> {
         self
     }
 
-    /// This function sets the main [`Span`] of this diagnostic message.
-    /// [`AstContext::emit_lint`] will by default use the span of the given
+    /// This function sets the main [`Span`] of the created diagnostic.
+    /// [`AstContext::emit_lint`] will by default use the [`Span`] of the given
     /// [`EmissionNode`].
     ///
     /// From rustc a lint emission would look like this:
@@ -267,7 +267,7 @@ impl<'ast> DiagnosticBuilder<'ast> {
             let span = self
                 .span
                 .as_ref()
-                .expect("always Some, if `DiagnosticBuilder::emit_lint` is true");
+                .expect("always `Some`, if `DiagnosticBuilder::emit_lint` is true");
             let diag = Diagnostic {
                 lint: self.lint,
                 msg: self.msg.as_str().into(),
@@ -311,7 +311,7 @@ pub trait EmissionNode<'ast>: Debug + Copy {
     /// [`DiagnosticBuilder::set_main_span`].
     ///
     /// The [`AstContext`] can be used to fetch the [`Span`], if this is implemented on
-    /// a id.
+    /// an id.
     fn emission_span(&self, _cx: &AstContext<'ast>) -> Option<Span<'ast>>;
 }