Wrap code snippets in +, not backticks, in sdoc

I grepped the source code for code snippets wrapped in backticks in the comments
and replaced the backticks with plus signs so they are correctly displayed in
the Rails documentation.

[ci skip]

4 files changed, 6 insertions, 6 deletions

diff --git a/activerecord/lib/active_record/associations/collection_association.rb b/activerecord/lib/active_record/associations/collection_association.rb
index 93f611dd8d..d59cebb08b 100644
--- a/activerecord/lib/active_record/associations/collection_association.rb
+++ b/activerecord/lib/active_record/associations/collection_association.rb
@@ -175,8 +175,8 @@ module ActiveRecord
       end
 
       # Removes all records from the association without calling callbacks
-      # on the associated records. It honors the `:dependent` option. However
-      # if the `:dependent` value is `:destroy` then in that case the `:delete_all`
+      # on the associated records. It honors the +:dependent+ option. However
+      # if the +:dependent+ value is +:destroy+ then in that case the +:delete_all+
       # deletion strategy for the association is applied.
       #
       # You can force a particular deletion strategy by passing a parameter.
diff --git a/activerecord/lib/active_record/connection_adapters/connection_specification.rb b/activerecord/lib/active_record/connection_adapters/connection_specification.rb
index 609ec7dabd..e54e3199ff 100644
--- a/activerecord/lib/active_record/connection_adapters/connection_specification.rb
+++ b/activerecord/lib/active_record/connection_adapters/connection_specification.rb
@@ -234,7 +234,7 @@ module ActiveRecord
           end
         end
 
-        # Takes the environment such as `:production` or `:development`.
+        # Takes the environment such as +:production+ or +:development+.
         # This requires that the @configurations was initialized with a key that
         # matches.
         #
diff --git a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
index 3357ed52e5..8b7459ef27 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
@@ -58,7 +58,7 @@ module ActiveRecord
     # * <tt>:encoding</tt> - (Optional) Sets the client encoding by executing "SET NAMES <encoding>" after connection.
     # * <tt>:reconnect</tt> - Defaults to false (See MySQL documentation: http://dev.mysql.com/doc/refman/5.0/en/auto-reconnect.html).
     # * <tt>:strict</tt> - Defaults to true. Enable STRICT_ALL_TABLES. (See MySQL documentation: http://dev.mysql.com/doc/refman/5.0/en/server-sql-mode.html)
-    # * <tt>:variables</tt> - (Optional) A hash session variables to send as `SET @@SESSION.key = value` on each database connection. Use the value `:default` to set a variable to its DEFAULT value. (See MySQL documentation: http://dev.mysql.com/doc/refman/5.0/en/set-statement.html).
+    # * <tt>:variables</tt> - (Optional) A hash session variables to send as <tt>SET @@SESSION.key = value</tt> on each database connection. Use the value +:default+ to set a variable to its DEFAULT value. (See MySQL documentation: http://dev.mysql.com/doc/refman/5.0/en/set-statement.html).
     # * <tt>:sslca</tt> - Necessary to use MySQL with an SSL connection.
     # * <tt>:sslkey</tt> - Necessary to use MySQL with an SSL connection.
     # * <tt>:sslcert</tt> - Necessary to use MySQL with an SSL connection.
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index 6310d70192..3698957d8d 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -125,7 +125,7 @@ module ActiveRecord
         PostgreSQL::SchemaCreation.new self
       end
 
-      # Adds `:array` option to the default set provided by the
+      # Adds +:array+ option to the default set provided by the
       # AbstractAdapter
       def prepare_column_options(column, types) # :nodoc:
         spec = super
@@ -134,7 +134,7 @@ module ActiveRecord
         spec
       end
 
-      # Adds `:array` as a valid migration key
+      # Adds +:array+ as a valid migration key
       def migration_keys
         super + [:array]
       end