Use squiggly heredoc to strip odd indentation in the executed SQL

Before:

```
LOG:  execute <unnamed>:             SELECT t.oid, t.typname
                    FROM pg_type as t
                    WHERE t.typname IN ('int2', 'int4', 'int8', 'oid', 'float4', 'float8', 'bool')

LOG:  execute <unnamed>:               SELECT t.oid, t.typname, t.typelem, t.typdelim, t.typinput, r.rngsubtype, t.typtype, t.typbasetype
                      FROM pg_type as t
                      LEFT JOIN pg_range as r ON oid = rngtypid
                      WHERE
                        t.typname IN ('int2', 'int4', 'int8', 'oid', 'float4', 'float8', 'text', 'varchar', 'char', 'name', 'bpchar', 'bool', 'bit', 'varbit', 'timestamptz', 'date', 'money', 'bytea', 'point', 'hstore', 'json', 'jsonb', 'cidr', 'inet', 'uuid', 'xml', 'tsvector', 'macaddr', 'citext', 'ltree', 'interval', 'path', 'line', 'polygon', 'circle', 'lseg', 'box', 'time', 'timestamp', 'numeric')
                        OR t.typtype IN ('r', 'e', 'd')
                        OR t.typinput::varchar = 'array_in'
                        OR t.typelem != 0

LOG:  statement: SHOW TIME ZONE
LOG:  statement: SELECT 1
LOG:  execute <unnamed>:               SELECT COUNT(*)
                      FROM pg_class c
                      LEFT JOIN pg_namespace n ON n.oid = c.relnamespace
                      WHERE c.relkind IN ('r','v','m') -- (r)elation/table, (v)iew, (m)aterialized view
                      AND c.relname = 'accounts'
                      AND n.nspname = ANY (current_schemas(false))
```

After:

```
LOG:  execute <unnamed>: SELECT t.oid, t.typname
        FROM pg_type as t
        WHERE t.typname IN ('int2', 'int4', 'int8', 'oid', 'float4', 'float8', 'bool')

LOG:  execute <unnamed>: SELECT t.oid, t.typname, t.typelem, t.typdelim, t.typinput, r.rngsubtype, t.typtype, t.typbasetype
        FROM pg_type as t
        LEFT JOIN pg_range as r ON oid = rngtypid
                      WHERE
                        t.typname IN ('int2', 'int4', 'int8', 'oid', 'float4', 'float8', 'text', 'varchar', 'char', 'name', 'bpchar', 'bool', 'bit', 'varbit', 'timestamptz', 'date', 'money', 'bytea', 'point', 'hstore', 'json', 'jsonb', 'cidr', 'inet', 'uuid', 'xml', 'tsvector', 'macaddr', 'citext', 'ltree', 'interval', 'path', 'line', 'polygon', 'circle', 'lseg', 'box', 'time', 'timestamp', 'numeric')
                        OR t.typtype IN ('r', 'e', 'd')
                        OR t.typinput::varchar = 'array_in'
                        OR t.typelem != 0

LOG:  statement: SHOW TIME ZONE
LOG:  statement: SELECT 1
LOG:  execute <unnamed>: SELECT COUNT(*)
        FROM pg_class c
        LEFT JOIN pg_namespace n ON n.oid = c.relnamespace
        WHERE c.relkind IN ('r','v','m') -- (r)elation/table, (v)iew, (m)aterialized view
        AND c.relname = 'accounts'
        AND n.nspname = ANY (current_schemas(false))
```

6 files changed, 22 insertions, 22 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/oid/type_map_initializer.rb b/activerecord/lib/active_record/connection_adapters/postgresql/oid/type_map_initializer.rb
index 83c21ba6ea..203087bc36 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/oid/type_map_initializer.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/oid/type_map_initializer.rb
@@ -36,7 +36,7 @@ module ActiveRecord
           def query_conditions_for_initial_load
             known_type_names = @store.keys.map { |n| "'#{n}'" }
             known_type_types = %w('r' 'e' 'd')
-            <<-SQL % [known_type_names.join(", "), known_type_types.join(", ")]
+            <<~SQL % [known_type_names.join(", "), known_type_types.join(", ")]
               WHERE
                 t.typname IN (%s)
                 OR t.typtype IN (%s)
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
index f39e94ee7f..16260fe565 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
@@ -68,7 +68,7 @@ module ActiveRecord
           table = quoted_scope(table_name)
           index = quoted_scope(index_name)
 
-          query_value(<<-SQL, "SCHEMA").to_i > 0
+          query_value(<<~SQL, "SCHEMA").to_i > 0
             SELECT COUNT(*)
             FROM pg_class t
             INNER JOIN pg_index d ON t.oid = d.indrelid
@@ -85,7 +85,7 @@ module ActiveRecord
         def indexes(table_name) # :nodoc:
           scope = quoted_scope(table_name)
 
-          result = query(<<-SQL, "SCHEMA")
+          result = query(<<~SQL, "SCHEMA")
             SELECT distinct i.relname, d.indisunique, d.indkey, pg_get_indexdef(d.indexrelid), t.oid,
                             pg_catalog.obj_description(i.oid, 'pg_class') AS comment
             FROM pg_class t
@@ -196,7 +196,7 @@ module ActiveRecord
 
         # Returns an array of schema names.
         def schema_names
-          query_values(<<-SQL, "SCHEMA")
+          query_values(<<~SQL, "SCHEMA")
             SELECT nspname
               FROM pg_namespace
              WHERE nspname !~ '^pg_.*'
@@ -302,7 +302,7 @@ module ActiveRecord
         def pk_and_sequence_for(table) #:nodoc:
           # First try looking for a sequence with a dependency on the
           # given table's primary key.
-          result = query(<<-end_sql, "SCHEMA")[0]
+          result = query(<<~SQL, "SCHEMA")[0]
             SELECT attr.attname, nsp.nspname, seq.relname
             FROM pg_class      seq,
                  pg_attribute  attr,
@@ -319,10 +319,10 @@ module ActiveRecord
               AND cons.contype      = 'p'
               AND dep.classid       = 'pg_class'::regclass
               AND dep.refobjid      = #{quote(quote_table_name(table))}::regclass
-          end_sql
+          SQL
 
           if result.nil? || result.empty?
-            result = query(<<-end_sql, "SCHEMA")[0]
+            result = query(<<~SQL, "SCHEMA")[0]
               SELECT attr.attname, nsp.nspname,
                 CASE
                   WHEN pg_get_expr(def.adbin, def.adrelid) !~* 'nextval' THEN NULL
@@ -339,7 +339,7 @@ module ActiveRecord
               WHERE t.oid = #{quote(quote_table_name(table))}::regclass
                 AND cons.contype = 'p'
                 AND pg_get_expr(def.adbin, def.adrelid) ~* 'nextval|uuid_generate'
-            end_sql
+            SQL
           end
 
           pk = result.shift
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index d2ed699ee2..31c046d620 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -590,13 +590,13 @@ module ActiveRecord
           initializer = OID::TypeMapInitializer.new(type_map)
 
           if supports_ranges?
-            query = <<-SQL
+            query = <<~SQL
               SELECT t.oid, t.typname, t.typelem, t.typdelim, t.typinput, r.rngsubtype, t.typtype, t.typbasetype
               FROM pg_type as t
               LEFT JOIN pg_range as r ON oid = rngtypid
             SQL
           else
-            query = <<-SQL
+            query = <<~SQL
               SELECT t.oid, t.typname, t.typelem, t.typdelim, t.typinput, t.typtype, t.typbasetype
               FROM pg_type as t
             SQL
@@ -776,7 +776,7 @@ module ActiveRecord
         #  - format_type includes the column size constraint, e.g. varchar(50)
         #  - ::regclass is a function that gives the id for a table name
         def column_definitions(table_name)
-          query(<<-end_sql, "SCHEMA")
+          query(<<~SQL, "SCHEMA")
               SELECT a.attname, format_type(a.atttypid, a.atttypmod),
                      pg_get_expr(d.adbin, d.adrelid), a.attnotnull, a.atttypid, a.atttypmod,
                      c.collname, col_description(a.attrelid, a.attnum) AS comment
@@ -787,7 +787,7 @@ module ActiveRecord
                WHERE a.attrelid = #{quote(quote_table_name(table_name))}::regclass
                  AND a.attnum > 0 AND NOT a.attisdropped
                ORDER BY a.attnum
-          end_sql
+          SQL
         end
 
         def extract_table_ref_from_insert_sql(sql)
@@ -802,7 +802,7 @@ module ActiveRecord
         def can_perform_case_insensitive_comparison_for?(column)
           @case_insensitive_cache ||= {}
           @case_insensitive_cache[column.sql_type] ||= begin
-            sql = <<-end_sql
+            sql = <<~SQL
               SELECT exists(
                 SELECT * FROM pg_proc
                 WHERE proname = 'lower'
@@ -814,7 +814,7 @@ module ActiveRecord
                 WHERE proname = 'lower'
                   AND castsource = #{quote column.sql_type}::regtype
               )
-            end_sql
+            SQL
             execute_and_clear(sql, "SCHEMA", []) do |result|
               result.getvalue(0, 0)
             end
@@ -840,7 +840,7 @@ module ActiveRecord
             "bool" => PG::TextDecoder::Boolean,
           }
           known_coder_types = coders_by_name.keys.map { |n| quote(n) }
-          query = <<-SQL % known_coder_types.join(", ")
+          query = <<~SQL % known_coder_types.join(", ")
             SELECT t.oid, t.typname
             FROM pg_type as t
             WHERE t.typname IN (%s)
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb
index 48277f0ae2..8650c07bab 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb
@@ -11,7 +11,7 @@ module ActiveRecord
             # See https://www.sqlite.org/fileformat2.html#intschema
             next if row["name"].starts_with?("sqlite_")
 
-            index_sql = query_value(<<-SQL, "SCHEMA")
+            index_sql = query_value(<<~SQL, "SCHEMA")
               SELECT sql
               FROM sqlite_master
               WHERE name = #{quote(row['name'])} AND type = 'index'
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb
index 3312c3de01..b4553af39a 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb
@@ -550,7 +550,7 @@ module ActiveRecord
 
         def table_structure_with_collation(table_name, basic_structure)
           collation_hash = {}
-          sql = <<-SQL
+          sql = <<~SQL
             SELECT sql FROM
               (SELECT * FROM sqlite_master UNION ALL
                SELECT * FROM sqlite_temp_master)
diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index 6e5a610642..24782f8748 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -23,7 +23,7 @@ module ActiveRecord
   #         t.string :zipcode
   #       end
   #
-  #       execute <<-SQL
+  #       execute <<~SQL
   #         ALTER TABLE distributors
   #           ADD CONSTRAINT zipchk
   #             CHECK (char_length(zipcode) = 5) NO INHERIT;
@@ -41,7 +41,7 @@ module ActiveRecord
   #        t.string :zipcode
   #      end
   #
-  #      execute <<-SQL
+  #      execute <<~SQL
   #        ALTER TABLE distributors
   #          ADD CONSTRAINT zipchk
   #            CHECK (char_length(zipcode) = 5) NO INHERIT;
@@ -49,7 +49,7 @@ module ActiveRecord
   #    end
   #
   #    def down
-  #      execute <<-SQL
+  #      execute <<~SQL
   #        ALTER TABLE distributors
   #          DROP CONSTRAINT zipchk
   #      SQL
@@ -68,7 +68,7 @@ module ActiveRecord
   #
   #       reversible do |dir|
   #         dir.up do
-  #           execute <<-SQL
+  #           execute <<~SQL
   #             ALTER TABLE distributors
   #               ADD CONSTRAINT zipchk
   #                 CHECK (char_length(zipcode) = 5) NO INHERIT;
@@ -76,7 +76,7 @@ module ActiveRecord
   #         end
   #
   #         dir.down do
-  #           execute <<-SQL
+  #           execute <<~SQL
   #             ALTER TABLE distributors
   #               DROP CONSTRAINT zipchk
   #           SQL