minor symfony#10633 Update percent.rst (ThomasLandauer)

This PR was merged into the 2.8 branch.

Discussion
----------

Update percent.rst

Changed `.95` to  `0.95` cause it's (a) better legible (cause it increases the contrast to `95`) and (b) formally correcter.

Commits
-------

77ed801 Update percent.rst

Author: javiereguiluz

reference/forms/types/percent.rst

@@ -5,7 +5,7 @@ PercentType Field
 =================
 
 The ``PercentType`` renders an input text field and specializes in handling
-percentage data. If your percentage data is stored as a decimal (e.g. ``.95``),
+percentage data. If your percentage data is stored as a decimal (e.g. ``0.95``),
 you can use this field out-of-the-box. If you store your data as a number
 (e.g. ``95``), you should set the ``type`` option to ``integer``.
 
@@ -60,14 +60,14 @@ type
 **type**: ``string`` **default**: ``fractional``
 
 This controls how your data is stored on your object. For example, a percentage
-corresponding to "55%", might be stored as ``.55`` or ``55`` on your
+corresponding to "55%", might be stored as ``0.55`` or ``55`` on your
 object. The two "types" handle these two cases:
 
 *   ``fractional``
-    If your data is stored as a decimal (e.g. ``.55``), use this type.
+    If your data is stored as a decimal (e.g. ``0.55``), use this type.
     The data will be multiplied by ``100`` before being shown to the
     user (e.g. ``55``). The submitted data will be divided by ``100``
-    on form submit so that the decimal value is stored (``.55``);
+    on form submit so that the decimal value is stored (``0.55``);
 
 *   ``integer``
     If your data is stored as an integer (e.g. 55), then use this option.