Strip leading/trailing whitespace from prompt input

This doesn't really solve a pressing problem, because I guess it's unlikely that
users add spaces at the beginning or end of what they type into a prompt; but it
could happen, and in this case we almost always want to strip it. Just adding
this here for completeness while I was working on this code.

The only exception is the input prompt of custom commands, because who knows
what users want to use that input for in their custom command.

pkg/gui/controllers/helpers/confirmation_helper.go

@@ -49,6 +49,7 @@ func (self *ConfirmationHelper) wrappedPromptConfirmationFunction(
 	function func(string) error,
 	getResponse func() string,
 	allowEmptyInput bool,
+	preserveWhitespace bool,
 ) func() error {
 	return func() error {
 		if self.c.GocuiGui().IsPasting {
@@ -60,6 +61,9 @@ func (self *ConfirmationHelper) wrappedPromptConfirmationFunction(
 		}
 
 		response := getResponse()
+		if !preserveWhitespace {
+			response = strings.TrimSpace(response)
+		}
 
 		if response == "" && !allowEmptyInput {
 			self.c.ErrorToast(self.c.Tr.PromptInputCannotBeEmptyToast)
@@ -248,13 +252,14 @@ func (self *ConfirmationHelper) setConfirmationKeyBindings(cancel goContext.Canc
 func (self *ConfirmationHelper) setPromptKeyBindings(cancel goContext.CancelFunc, opts types.CreatePopupPanelOpts) {
 	onConfirm := self.wrappedPromptConfirmationFunction(cancel, opts.HandleConfirmPrompt,
 		func() string { return self.c.Views().Prompt.TextArea.GetContent() },
-		opts.AllowEmptyInput)
+		opts.AllowEmptyInput, opts.PreserveWhitespace)
 
 	onSuggestionConfirm := self.wrappedPromptConfirmationFunction(
 		cancel,
 		opts.HandleConfirmPrompt,
 		self.getSelectedSuggestionValue,
 		opts.AllowEmptyInput,
+		opts.PreserveWhitespace,
 	)
 
 	onClose := self.wrappedConfirmationFunction(cancel, opts.HandleClose)

pkg/gui/controllers/shell_command_action.go

@@ -19,6 +19,7 @@ func (self *ShellCommandAction) Call() error {
 		Title:               self.c.Tr.ShellCommand,
 		FindSuggestionsFunc: self.GetShellCommandsHistorySuggestionsFunc(),
 		AllowEditSuggestion: true,
+		PreserveWhitespace:  true,
 		HandleConfirm: func(command string) error {
 			if self.shouldSaveCommand(command) {
 				self.c.GetAppState().ShellCommandsHistory = utils.Limit(

pkg/gui/popup/popup_handler.go

@@ -140,6 +140,7 @@ func (self *PopupHandler) Prompt(opts types.PromptOpts) {
 		FindSuggestionsFunc:    opts.FindSuggestionsFunc,
 		AllowEditSuggestion:    opts.AllowEditSuggestion,
 		AllowEmptyInput:        opts.AllowEmptyInput,
+		PreserveWhitespace:     opts.PreserveWhitespace,
 		Mask:                   opts.Mask,
 	})
 }

pkg/gui/services/custom_commands/handler_creator.go

@@ -126,6 +126,7 @@ func (self *HandlerCreator) inputPrompt(prompt *config.CustomCommandPrompt, wrap
 			return wrappedF(str)
 		},
 		AllowEmptyInput:    true,
+		PreserveWhitespace: true,
 	})
 
 	return nil

pkg/gui/types/common.go

@@ -173,6 +173,7 @@ type CreatePopupPanelOpts struct {
 	Mask                bool
 	AllowEditSuggestion bool
 	AllowEmptyInput     bool
+	PreserveWhitespace  bool
 }
 
 type ConfirmOpts struct {
@@ -192,6 +193,7 @@ type PromptOpts struct {
 	HandleConfirm       func(string) error
 	AllowEditSuggestion bool
 	AllowEmptyInput     bool
+	PreserveWhitespace  bool
 	// CAPTURE THIS
 	HandleClose            func() error
 	HandleDeleteSuggestion func(int) error