fix docgen link (#3815)

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aws/sdk-codegen/src/main/kotlin/software/amazon/smithy/rustsdk/AwsDocs.kt

@@ -73,7 +73,7 @@ object AwsDocs {
 
  Occasionally, SDKs may have additional service-specific values that can be set on the [`Config`] that
  is absent from [`SdkConfig`], or slightly different settings for a specific client may be desired.
- The [`Builder`] struct implements `From<&SdkConfig>`, so setting these specific settings can be
+ The [`Builder`](crate::config::Builder) struct implements `From<&SdkConfig>`, so setting these specific settings can be
  done as follows:
 
  ```rust,no_run

codegen-core/src/main/kotlin/software/amazon/smithy/rust/codegen/core/smithy/generators/BuilderGenerator.kt

@@ -21,6 +21,7 @@ import software.amazon.smithy.rust.codegen.core.rustlang.asOptional
 import software.amazon.smithy.rust.codegen.core.rustlang.conditionalBlockTemplate
 import software.amazon.smithy.rust.codegen.core.rustlang.deprecatedShape
 import software.amazon.smithy.rust.codegen.core.rustlang.docs
+import software.amazon.smithy.rust.codegen.core.rustlang.docsTemplate
 import software.amazon.smithy.rust.codegen.core.rustlang.documentShape
 import software.amazon.smithy.rust.codegen.core.rustlang.map
 import software.amazon.smithy.rust.codegen.core.rustlang.render
@@ -91,7 +92,7 @@ fun MemberShape.enforceRequired(
  }
  val shape = this
  val isOptional = codegenContext.symbolProvider.toSymbol(shape).isOptional()
- val field = field.letIf(!isOptional) { field.map { rust("Some(#T)", it) } }
+ val field = field.letIf(!isOptional) { it.map { t -> rust("Some(#T)", t) } }
  val error =
  OperationBuildError(codegenContext.runtimeConfig).missingField(
  codegenContext.symbolProvider.toMemberName(shape), "A required field was not set",
@@ -100,10 +101,7 @@ fun MemberShape.enforceRequired(
  when (codegenContext.model.expectShape(this.target)) {
  is StringShape ->
  writable {
- rustTemplate(
- "#{field}.filter(|f|!AsRef::<str>::as_ref(f).trim().is_empty())",
- "field" to field,
- )
+ rust("#T.filter(|f|!AsRef::<str>::as_ref(f).trim().is_empty())", field)
  }
 
  else -> field
@@ -221,7 +219,11 @@ class BuilderGenerator(
  implBlockWriter.docs("This method will fail if any of the following fields are not set:")
  trulyRequiredMembers.forEach {
  val memberName = symbolProvider.toMemberName(it)
- implBlockWriter.docs("- [`$memberName`](#T::$memberName)", symbolProvider.symbolForBuilder(shape))
+ implBlockWriter.docsTemplate(
+ // We have to remove the `r##` prefix in the path b/c Rustdoc doesn't support it.
+ "- [`$memberName`](#{struct}::${memberName.removePrefix("r##")})",
+ "struct" to symbolProvider.symbolForBuilder(shape),
+ )
  }
  }
  implBlockWriter.rustBlockTemplate("pub fn build(self) -> $returnType", *preludeScope) {