Accept a String for the expression in FunctionCallExpr(calledExpression:) convenience initializer

Author: ahoppen

Sources/SwiftSyntaxBuilder/ConvenienceInitializers.swift

@@ -96,15 +96,15 @@ extension FunctionCallExpr {
   /// instead of having to wrap them in a `TupleExprElementList`.
   /// The presence of the parenthesis will be inferred based on the presence of arguments and the trailing closure.
   public init(
-    calledExpression: ExprSyntaxProtocol,
+    calledExpression: String,
     trailingClosure: ClosureExprSyntax? = nil,
     additionalTrailingClosures: MultipleTrailingClosureElementList? = nil,
     @TupleExprElementListBuilder argumentList: () -> TupleExprElementList = { [] }
   ) {
     let argumentList = argumentList()
     let shouldOmitParens = argumentList.isEmpty && trailingClosure != nil
     self.init(
-      calledExpression: calledExpression,
+      calledExpression: Expr(calledExpression),
       leftParen: shouldOmitParens ? nil : .leftParen,
       argumentList: argumentList,
       rightParen: shouldOmitParens ? nil : .rightParen,