Remove mutating from function that doesn't mutate anything

Sources/SwiftDocCUtilities/ArgumentParsing/ActionExtensions/Action+performAndHandleResult.swift

@@ -17,7 +17,7 @@ extension AsyncAction {
     /// - Parameter logHandle: The log handle to write encountered warnings and errors to.
     ///
     /// - Throws: `ErrorsEncountered` if any errors are produced while performing the action.
-    public mutating func performAndHandleResult(logHandle: LogHandle = .standardOutput) async throws {
+    public func performAndHandleResult(logHandle: LogHandle = .standardOutput) async throws {
         var logHandle = logHandle
         // Perform the Action and collect the result
         let result = try await perform(logHandle: &logHandle)

Sources/SwiftDocCUtilities/ArgumentParsing/Subcommands/Convert.swift

@@ -674,7 +674,7 @@ extension Docc {
         }
 
         public func run() async throws {
-            var convertAction = try ConvertAction(fromConvertCommand: self)
+            let convertAction = try ConvertAction(fromConvertCommand: self)
             try await convertAction.performAndHandleResult()
         }
 

Sources/SwiftDocCUtilities/ArgumentParsing/Subcommands/EmitGeneratedCuration.swift

@@ -157,7 +157,7 @@ extension Docc.ProcessCatalog {
         }
 
         func run() async throws {
-            var action = try EmitGeneratedCurationAction(fromCommand: self)
+            let action = try EmitGeneratedCurationAction(fromCommand: self)
             try await action.performAndHandleResult()
         }
     }

Sources/SwiftDocCUtilities/ArgumentParsing/Subcommands/Index.swift

@@ -37,7 +37,7 @@ extension Docc {
         }
 
         public func run() async throws {
-            var indexAction = try IndexAction(fromIndexCommand: self)
+            let indexAction = try IndexAction(fromIndexCommand: self)
             try await indexAction.performAndHandleResult()
         }
     }

Sources/SwiftDocCUtilities/ArgumentParsing/Subcommands/Init.swift

@@ -25,7 +25,7 @@ extension Docc {
         public var initOptions: InitOptions
 
         public func run() async throws {
-            var initAction = try InitAction(fromInitOptions: initOptions)
+            let initAction = try InitAction(fromInitOptions: initOptions)
             try await initAction.performAndHandleResult()
         }
     }

Sources/SwiftDocCUtilities/ArgumentParsing/Subcommands/Merge.swift

@@ -169,7 +169,7 @@ extension Docc {
 
         public func run() async throws {
             // Initialize a `ConvertAction` from the current options in the `Convert` command.
-            var convertAction = MergeAction(
+            let convertAction = MergeAction(
                 archives: archives,
                 landingPageInfo: .synthesize(.init(name: synthesizedLandingPageName, kind: synthesizedLandingPageKind, style: synthesizedLandingPageTopicsStyle)),
                 outputURL: outputURL,

Sources/SwiftDocCUtilities/ArgumentParsing/Subcommands/Preview.swift

@@ -44,7 +44,7 @@ extension Docc {
         }
 
         public func run() async throws {
-            var previewAction = try PreviewAction(fromPreviewOptions: previewOptions)
+            let previewAction = try PreviewAction(fromPreviewOptions: previewOptions)
             try await previewAction.performAndHandleResult()
         }
     }

Sources/SwiftDocCUtilities/ArgumentParsing/Subcommands/TransformForStaticHosting.swift

@@ -63,7 +63,7 @@ extension Docc.ProcessArchive {
         }
 
         func run() async throws {
-            var action = try TransformForStaticHostingAction(fromCommand: self)
+            let action = try TransformForStaticHostingAction(fromCommand: self)
             try await action.performAndHandleResult()
         }
     }