We no longer have two doc systems, move sphinx_doc_src back to doc_src

doc_src/cmds/fish_indent.rst

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+.. _cmd-fish_indent:
+
+fish_indent - indenter and prettifier
+=====================================
+
+Synopsis
+--------
+
+::
+
+    fish_indent [OPTIONS] [FILE...]
+
+
+Description
+-----------
+
+``fish_indent`` is used to indent a piece of fish code. ``fish_indent`` reads commands from standard input or the given filenames and outputs them to standard output or a specified file (if `-w` is given).
+
+The following options are available:
+
+- ``-w`` or ``--write`` indents a specified file and immediately writes to that file.
+
+- ``-i`` or ``--no-indent`` do not indent commands; only reformat to one job per line.
+
+- ``-v`` or ``--version`` displays the current fish version and then exits.
+
+- ``--ansi`` colorizes the output using ANSI escape sequences, appropriate for the current $TERM, using the colors defined in the environment (such as ``$fish_color_command``).
+
+- ``--html`` outputs HTML, which supports syntax highlighting if the appropriate CSS is defined. The CSS class names are the same as the variable names, such as ``fish_color_command``.
+
+- ``-d`` or ``--debug=CATEGORY_GLOB`` enables debug output and specifies a glob for matching debug categories (like ``fish -d``). Defaults to empty.
+
+- ``-D`` or ``--debug-stack-frames=DEBUG_LEVEL`` specify how many stack frames to display when debug messages are written. The default is zero. A value of 3 or 4 is usually sufficient to gain insight into how a given debug call was reached but you can specify a value up to 128.
+
+- ``--dump-parse-tree`` dumps information about the parsed statements to stderr. This is likely to be of interest only to people working on the fish source code.