feature #12294 scope singly-implemented interfaces detection by file (daniel-iwaniec)

This PR was merged into the 4.4 branch.

Discussion
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scope singly-implemented interfaces detection by file

Documentation change for symfony/symfony#33350

This is probably the only place where automatically registering singly implemented interfaces is referenced.

Commits
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ae343bc scope singly-implemented interfaces detection by file

Author: OskarStark

service_container/autowiring.rst

@@ -368,7 +368,7 @@ dealing with the ``TransformerInterface``.
 
     When using a `service definition prototype`_, if only one service is
     discovered that implements an interface, and that interface is also
-    discovered at the same time, configuring the alias is not mandatory
+    discovered in the same file, configuring the alias is not mandatory
     and Symfony will automatically create one.
 
 Dealing with Multiple Implementations of the Same Type