Improve the formatting of the lists of special characters

components/cache/cache_items.rst

@@ -12,9 +12,8 @@ Cache Item Keys and Values
 The **key** of a cache item is a plain string which acts as its
 identifier, so it must be unique for each cache pool. You can freely choose the
 keys, but they should only contain letters (A-Z, a-z), numbers (0-9) and the
-``_`` and ``.`` symbols. Other common symbols (such as ``{``, ``}``, ``(``,
-``)``, ``/``, ``\``, ``@`` and ``:``) are reserved by the PSR-6 standard for future
-uses.
+``_`` and ``.`` symbols. Other common symbols (such as ``{ } ( ) / \ @ :``) are
+reserved by the PSR-6 standard for future uses.
 
 The **value** of a cache item can be any data represented by a type which is
 serializable by PHP, such as basic types (string, integer, float, boolean, null),

doctrine.rst

@@ -61,7 +61,7 @@ The database connection information is stored as an environment variable called
 .. caution::
 
     If the username, password, host or database name contain any character considered
-    special in a URI (such as ``+``, ``@``, ``$``, ``#``, ``/``, ``:``, ``*``, ``!``, ``%``),
+    special in a URI (such as ``: / ? # [ ] @ ! $ & ' ( ) * + , ; =``),
     you must encode them. See `RFC 3986`_ for the full list of reserved characters or
     use the :phpfunction:`urlencode` function to encode them. In this case you need to
     remove the ``resolve:`` prefix in ``config/packages/doctrine.yaml`` to avoid errors:

mailer.rst

@@ -64,7 +64,7 @@ over SMTP by configuring the DSN in your ``.env`` file (the ``user``,
 .. caution::
 
     If the username, password or host contain any character considered special in a
-    URI (such as ``+``, ``@``, ``$``, ``#``, ``/``, ``:``, ``*``, ``!``), you must
+    URI (such as ``: / ? # [ ] @ ! $ & ' ( ) * + , ; =``), you must
     encode them. See `RFC 3986`_ for the full list of reserved characters or use the
     :phpfunction:`urlencode` function to encode them.
 

notifier.rst

@@ -50,7 +50,7 @@ SMS Channel
 .. caution::
 
     If any of the DSN values contains any character considered special in a
-    URI (such as ``+``, ``@``, ``$``, ``#``, ``/``, ``:``, ``*``, ``!``), you must
+    URI (such as ``: / ? # [ ] @ ! $ & ' ( ) * + , ; =``), you must
     encode them. See `RFC 3986`_ for the full list of reserved characters or use the
     :phpfunction:`urlencode` function to encode them.
 
@@ -211,7 +211,7 @@ Chat Channel
 .. caution::
 
     If any of the DSN values contains any character considered special in a
-    URI (such as ``+``, ``@``, ``$``, ``#``, ``/``, ``:``, ``*``, ``!``), you must
+    URI (such as ``: / ? # [ ] @ ! $ & ' ( ) * + , ; =``), you must
     encode them. See `RFC 3986`_ for the full list of reserved characters or use the
     :phpfunction:`urlencode` function to encode them.
 
@@ -415,7 +415,7 @@ Push Channel
 .. caution::
 
     If any of the DSN values contains any character considered special in a
-    URI (such as ``+``, ``@``, ``$``, ``#``, ``/``, ``:``, ``*``, ``!``), you must
+    URI (such as ``: / ? # [ ] @ ! $ & ' ( ) * + , ; =``), you must
     encode them. See `RFC 3986`_ for the full list of reserved characters or use the
     :phpfunction:`urlencode` function to encode them.
 

reference/formats/yaml.rst

@@ -34,12 +34,10 @@ must be doubled to escape it:
 
     'A single quote '' inside a single-quoted string'
 
-Strings containing any of the following characters must be quoted. Although you
-can use double quotes, for these characters it is more convenient to use single
-quotes, which avoids having to escape any backslash ``\``:
-
-* ``:``, ``{``, ``}``, ``[``, ``]``, ``,``, ``&``, ``*``, ``#``, ``?``, ``|``,
-  ``-``, ``<``, ``>``, ``=``, ``!``, ``%``, ``@``, `````
+Strings containing any of the following characters must be quoted:
+``: { } [ ] , & * # ? | - < > = ! % @`` Although you can use double quotes, for
+these characters it is more convenient to use single quotes, which avoids having
+to escape any backslash ``\``.
 
 The double-quoted style provides a way to express arbitrary strings, by
 using ``\`` to escape characters and sequences. For instance, it is very useful
@@ -52,11 +50,11 @@ when you need to embed a ``\n`` or a Unicode character in a string.
 If the string contains any of the following control characters, it must be
 escaped with double quotes:
 
-* ``\0``, ``\x01``, ``\x02``, ``\x03``, ``\x04``, ``\x05``, ``\x06``, ``\a``,
-  ``\b``, ``\t``, ``\n``, ``\v``, ``\f``, ``\r``, ``\x0e``, ``\x0f``, ``\x10``,
-  ``\x11``, ``\x12``, ``\x13``, ``\x14``, ``\x15``, ``\x16``, ``\x17``, ``\x18``,
-  ``\x19``, ``\x1a``, ``\e``, ``\x1c``, ``\x1d``, ``\x1e``, ``\x1f``, ``\N``,
-  ``\_``, ``\L``, ``\P``
+``\0``, ``\x01``, ``\x02``, ``\x03``, ``\x04``, ``\x05``, ``\x06``, ``\a``,
+``\b``, ``\t``, ``\n``, ``\v``, ``\f``, ``\r``, ``\x0e``, ``\x0f``, ``\x10``,
+``\x11``, ``\x12``, ``\x13``, ``\x14``, ``\x15``, ``\x16``, ``\x17``, ``\x18``,
+``\x19``, ``\x1a``, ``\e``, ``\x1c``, ``\x1d``, ``\x1e``, ``\x1f``, ``\N``,
+``\_``, ``\L``, ``\P``
 
 Finally, there are other cases when the strings must be quoted, no matter if
 you're using single or double quotes: