Fix typos in comments, code and documentation

While on it, newlines are removed from the end of two elog() strings.
The others are simple grammar mistakes.  One comment in pg_upgrade
referred incorrectly to sequences since a7e5457.

Author: Justin Pryzby
Discussion: https://postgr.es/m/20221230231257.GI1153@telsasoft.com
Backpatch-through: 11

doc/src/sgml/ref/alter_table.sgml

@@ -1005,7 +1005,7 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
       constraint. This does not work, however, if any of the partition keys
       is an expression and the partition does not accept
       <literal>NULL</literal> values. If attaching a list partition that will
-      not accept <literal>NULL</literal> values, also add
+      not accept <literal>NULL</literal> values, also add a
       <literal>NOT NULL</literal> constraint to the partition key column,
       unless it's an expression.
      </para>
@@ -1377,7 +1377,7 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
     type or an unconstrained domain over the new type, a table rewrite is not
     needed. However, indexes must always be rebuilt unless the system can
     verify that the new index would be logically equivalent to the existing
-    one.  For example, if the collation for a column has been changed an index
+    one.  For example, if the collation for a column has been changed, an index
     rebuild is always required because the new sort order might be different.
     However, in the absence of a collation change, a column can be changed
     from <type>text</type> to <type>varchar</type> (or vice versa) without

doc/src/sgml/ref/create_subscription.sgml

@@ -383,7 +383,7 @@ CREATE SUBSCRIPTION <replaceable class="parameter">subscription_name</replaceabl
    <literal>FOR TABLES IN SCHEMA</literal>, rows are always published
    regardless of the definition of the other expressions.
    If the subscriber is a <productname>PostgreSQL</productname> version before
-   15 then any row filtering is ignored during the initial data synchronization
+   15, then any row filtering is ignored during the initial data synchronization
    phase. For this case, the user might want to consider deleting any initially
    copied data that would be incompatible with subsequent filtering.
    Because initial data synchronization does not take into account the publication

doc/src/sgml/ref/grant.sgml

@@ -253,7 +253,7 @@ GRANT <replaceable class="parameter">role_name</replaceable> [, ...] TO <replace
    in a role to one or more other roles.  Membership in a role is significant
    because it potentially allows access to the privileges granted to a role
    to each of its members, and potentially also the ability to make changes
-   to the role itself. However, the actual permisions conferred depend on
+   to the role itself. However, the actual permissions conferred depend on
    the options associated with the grant.
   </para>