Use dashes instead of underscores pervasively in tutorial anchors

This fixes some broken help completions.

doc_src/tutorial.rst

@@ -265,7 +265,7 @@ To give a variable to an external command, it needs to be "exported". Unlike oth
 It can also be unexported with ``--unexport`` or ``-u``.
 
 
-.. _tut_lists:
+.. _tut-lists:
 
 Lists
 -----
@@ -380,7 +380,7 @@ Unlike other shells, fish does not split command substitutions on any whitespace
     -lglib-2.0
 
 
-.. _tut_semicolon:
+.. _tut-semicolon:
 
 Separating Commands (Semicolon)
 -------------------------------
@@ -434,7 +434,7 @@ fish also supports :ref:`and <cmd-and>`, :ref:`or <cmd-or>`, and :ref:`not <cmd-
     Backup failed
 
 
-As mentioned in :ref:`the section on the semicolon <tut_semicolon>`, this can also be written in multiple lines, like so::
+As mentioned in :ref:`the section on the semicolon <tut-semicolon>`, this can also be written in multiple lines, like so::
 
     cp file1.txt file1_bak.txt && cp file2.txt file2_bak.txt
     and echo "Backup successful"
@@ -606,7 +606,7 @@ You can choose among some sample prompts by running ``fish_config prompt``. ``fi
 $PATH
 -----
 
-``$PATH`` is an environment variable containing the directories that ``fish`` searches for commands. Unlike other shells, $PATH is a :ref:`list <tut_lists>`, not a colon-delimited string.
+``$PATH`` is an environment variable containing the directories that ``fish`` searches for commands. Unlike other shells, $PATH is a :ref:`list <tut-lists>`, not a colon-delimited string.
 
 To prepend /usr/local/bin and /usr/sbin to ``$PATH``, you can write::
 

share/completions/help.fish

@@ -74,28 +74,28 @@ complete -c help -x -a completion-path -d 'Where to put completions'
 
 # Tutorial
 complete -c help -x -a tutorial -d Tutorial
-complete -c help -x -a tut_autoload -d 'Autoloading Functions'
-complete -c help -x -a tut_autosuggestions -d Autosuggestions
-complete -c help -x -a tut_combiners -d 'Combiners (And, Or, Not)'
-complete -c help -x -a tut_command_substitutions -d 'Command Substitutions'
-complete -c help -x -a tut_conditionals -d 'Conditionals (If, Else, Switch)'
-complete -c help -x -a tut_exit_status -d 'Exit Status'
-complete -c help -x -a tut_exports -d 'Exports (Shell Variables)'
-complete -c help -x -a tut_functions -d Functions
-complete -c help -x -a tut_getting_help -d 'Getting Help'
-complete -c help -x -a tut_learning_Fish -d 'Learning fish'
-complete -c help -x -a tut_lists -d Lists
-complete -c help -x -a tut_loops -d Loops
-complete -c help -x -a tut_more -d 'Ready for more?'
-complete -c help -x -a tut_path -d '$PATH'
-complete -c help -x -a tut_pipes_and_redirections -d 'Pipes and Redirections'
-complete -c help -x -a tut_prompt -d Prompt
-complete -c help -x -a tut_running_commands -d 'Running Commands'
-complete -c help -x -a tut_semicolon -d 'Separating Commands (Semicolon)'
-complete -c help -x -a tut_startup -d "Startup (Where's .bashrc?)"
-complete -c help -x -a tut_syntax_highlighting -d 'Syntax Highlighting'
-complete -c help -x -a tut_tab_completions -d 'Tab Completions'
-complete -c help -x -a tut_universal -d 'Universal Variables'
-complete -c help -x -a tut_variables -d Variables
-complete -c help -x -a tut_why_fish -d 'Why fish?'
-complete -c help -x -a tut_wildcards -d Wildcards
+complete -c help -x -a tut-autoload -d 'Autoloading Functions'
+complete -c help -x -a tut-autosuggestions -d Autosuggestions
+complete -c help -x -a tut-combiners -d 'Combiners (And, Or, Not)'
+complete -c help -x -a tut-command_substitutions -d 'Command Substitutions'
+complete -c help -x -a tut-conditionals -d 'Conditionals (If, Else, Switch)'
+complete -c help -x -a tut-exit_status -d 'Exit Status'
+complete -c help -x -a tut-exports -d 'Exports (Shell Variables)'
+complete -c help -x -a tut-functions -d Functions
+complete -c help -x -a tut-getting_help -d 'Getting Help'
+complete -c help -x -a tut-learning_Fish -d 'Learning fish'
+complete -c help -x -a tut-lists -d Lists
+complete -c help -x -a tut-loops -d Loops
+complete -c help -x -a tut-more -d 'Ready for more?'
+complete -c help -x -a tut-path -d '$PATH'
+complete -c help -x -a tut-pipes_and_redirections -d 'Pipes and Redirections'
+complete -c help -x -a tut-prompt -d Prompt
+complete -c help -x -a tut-running_commands -d 'Running Commands'
+complete -c help -x -a tut-semicolon -d 'Separating Commands (Semicolon)'
+complete -c help -x -a tut-startup -d "Startup (Where's .bashrc?)"
+complete -c help -x -a tut-syntax_highlighting -d 'Syntax Highlighting'
+complete -c help -x -a tut-tab_completions -d 'Tab Completions'
+complete -c help -x -a tut-universal -d 'Universal Variables'
+complete -c help -x -a tut-variables -d Variables
+complete -c help -x -a tut-why_fish -d 'Why fish?'
+complete -c help -x -a tut-wildcards -d Wildcards

share/functions/help.fish

@@ -121,7 +121,7 @@ function help --description 'Show help for the fish shell'
             set fish_help_page "cmds/$fish_help_item.html"
         case 'completion-*'
             set fish_help_page "completions.html#$fish_help_item"
-        case 'tut_*'
+        case 'tut-*'
             set fish_help_page "tutorial.html#"(string sub -s 5 -- $fish_help_item | string replace -a -- _ -)
         case tutorial
             set fish_help_page "tutorial.html"