More indentation fixes.

Author: mkelley

docs/development/design-principles.rst

@@ -19,7 +19,7 @@ Epochs must be Time objects
 ---------------------------
 
 * Any kind of epoch or point in time must be of type `~astropy.time.Time`; time scales must be properly set and propagated through all functions.
-  
+
 
 Use sbpy ``DataClass`` objects
 ------------------------------
@@ -30,49 +30,49 @@ Use sbpy ``DataClass`` objects
 
 * The classes enable easy parameter passing from online sources.  Compare the following:
 
-.. code-block:: python
-     
-    eph = Ephem.from_horizons('2P')
-    # rh, delta required, phase angle is optional:
-    Afrho(wave, fluxd, aper, eph['rh'], eph['delta'], phase=eph['phase'])
-    # more to the point:
-    Afrho(wave, fluxd, aper, eph)
+    .. code-block:: python
 
-  Carefully document which fields are used by your function or method.
+        eph = Ephem.from_horizons('2P')
+        # rh, delta required, phase angle is optional:
+        Afrho(wave, fluxd, aper, eph['rh'], eph['delta'], phase=eph['phase'])
+        # more to the point:
+        Afrho(wave, fluxd, aper, eph)
+
+    Carefully document which fields are used by your function or method.
 
 * Dictionary-like objects may be allowed for user input, but should be internally converted to a ``DataClass`` object with the `~sbpy.data.dataclass_input` decorator:
 
-.. code-block:: python
-     
-    @dataclass_input(eph=Ephem)
-    def H11(eph):
-        ...
+    .. code-block:: python
 
-  The same, but using function annotations:
-  
-.. code-block:: python
-     
-    @dataclass_input
-    def H11(eph: Ephem):
-        ...
+        @dataclass_input(eph=Ephem)
+        def H11(eph):
+            ...
+
+    The same, but using function annotations:
+
+    .. code-block:: python
+
+        @dataclass_input
+        def H11(eph: Ephem):
+            ...
 
 * Exceptions are allowed when only one parameter is needed, e.g., ``phase_func(phase)``.  But instead consider using the relevant ``DataClass`` object, and decorating the function with `~sbpy.data.quantity_to_dataclass`:
 
-.. code-block:: python
+    .. code-block:: python
 
-    @quantity_to_dataclass(eph=(Ephem, 'phase'))
-    def phase_func(eph):
-        ...
+        @quantity_to_dataclass(eph=(Ephem, 'phase'))
+        def phase_func(eph):
+            ...
 
-  The decorator may be stacked with ``dataclass_input`` for maximum
-  flexibility:
+    The decorator may be stacked with ``dataclass_input`` for maximum
+    flexibility:
 
-.. code-block:: python
+    .. code-block:: python
 
-    @dataclass_input
-    @quantity_to_dataclass(eph=(Ephem, 'phase'))
-    def phase_func(eph):
-        ...
+        @dataclass_input
+        @quantity_to_dataclass(eph=(Ephem, 'phase'))
+        def phase_func(eph):
+            ...
 
 
 Append fields to ``DataClass`` at the user's request
@@ -94,11 +94,11 @@ Cite relevant works
 
 * Citations may be executed internally with :func:`sbpy.bib.register`, or via the `~sbpy.bib.cite` decorator:
 
-.. code-block:: python
+    .. code-block:: python
 
-    @cite({'method': '1687pnpm.book.....N'})
-    def force(mass, acceleration):
-        return mass * acceleration
+        @cite({'method': '1687pnpm.book.....N'})
+        def force(mass, acceleration):
+            return mass * acceleration
 
 * Labels describing references (``'method'`` in the above example) are
   required to start with the following strings: ``'method'`` (for