fix a few typos and doc comment formatting

Author: WowbaggersLiquidLunch

CodeGeneration/Sources/SyntaxSupport/Child.swift

@@ -147,8 +147,8 @@ public class Child {
 
   /// If a classification is passed, it specifies the color identifiers in
   /// that subtree should inherit for syntax coloring. Must be a member of
-  /// SyntaxClassification in SyntaxClassifier.h.gyb
-  /// If force_classification is also set to true, all child nodes (not only
+  /// ``SyntaxClassification`` in `SyntaxClassifier.h.gyb`
+  /// If `force_classification` is also set to true, all child nodes (not only
   /// identifiers) inherit the syntax classification.
   init(
     name: String,

CodeGeneration/Sources/SyntaxSupport/ExprNodes.swift

@@ -1602,7 +1602,7 @@ public let EXPR_NODES: [Node] = [
   ),
 
   // 'as' ('?'|'!')
-  // "as" type casting ooperator without operands.
+  // "as" type casting operator without operands.
   // NOTE: This appears only in SequenceExpr.
   Node(
     name: "UnresolvedAsExpr",
@@ -1622,7 +1622,7 @@ public let EXPR_NODES: [Node] = [
   ),
 
   // 'is'
-  // "is" type casting ooperator without operands.
+  // "is" type casting operator without operands.
   // NOTE: This appears only in SequenceExpr.
   Node(
     name: "UnresolvedIsExpr",

Sources/SwiftParser/Expressions.swift

@@ -139,7 +139,7 @@ extension Parser {
     // Parsed sequence elements except 'lastElement'.
     var elements = [RawExprSyntax]()
 
-    // The last element parsed. we don't eagarly append to 'elements' because we
+    // The last element parsed. we don't eagerly append to 'elements' because we
     // don't want to populate the 'Array' unless the expression is actually
     // sequenced.
     var lastElement: RawExprSyntax