Remove trailing whitespace from *.sgml files.

Historically we've been lax about this, but seeing that we're not
lax in C files, there doesn't seem to be a good reason to be so
in the documentation.  Remove the existing occurrences (mostly
though not entirely in copied-n-pasted psql output), and modify
.gitattributes so that "git diff --check" will warn about future
cases.

While at it, add *.pm to the set of extensions .gitattributes
knows about, and remove some obsolete entries for files that
we don't have in the tree anymore.

Per followup discussion of commit 5a892c9.

Discussion: https://postgr.es/m/[email protected]

Author: tglsfdc

.gitattributes

@@ -1,8 +1,9 @@
 *		whitespace=space-before-tab,trailing-space
 *.[chly]	whitespace=space-before-tab,trailing-space,indent-with-non-tab,tabwidth=4
 *.pl		whitespace=space-before-tab,trailing-space,tabwidth=4
+*.pm		whitespace=space-before-tab,trailing-space,tabwidth=4
 *.po		whitespace=space-before-tab,trailing-space,tab-in-indent,-blank-at-eof
-*.sgml		whitespace=space-before-tab,trailing-space,tab-in-indent,-blank-at-eol
+*.sgml		whitespace=space-before-tab,trailing-space,tab-in-indent
 *.x[ms]l	whitespace=space-before-tab,trailing-space,tab-in-indent
 
 # Avoid confusing ASCII underlines with leftover merge conflict markers
@@ -17,17 +18,13 @@ src/backend/utils/Gen_dummy_probes.pl.prolog	whitespace=-blank-at-eof
 
 # Test output files that contain extra whitespace
 *.out					-whitespace
-contrib/*/output/*.source		-whitespace
-src/pl/plpgsql/src/output/*.source	-whitespace
-src/test/regress/output/*.source	-whitespace
 src/interfaces/ecpg/test/expected/*	-whitespace
 src/interfaces/libpq/test/expected.out	whitespace=-blank-at-eof
 
 # These files are maintained or generated elsewhere.  We take them as is.
 configure				-whitespace
 ppport.h				-whitespace
 src/backend/regex/COPYRIGHT		-whitespace
-src/backend/regex/re_syntax.n		-whitespace
 src/backend/snowball/libstemmer/*.c	-whitespace
 src/backend/utils/mb/Unicode/*-std.txt	-whitespace
 src/include/snowball/libstemmer/*	-whitespace

doc/src/sgml/advanced.sgml

@@ -344,7 +344,7 @@ SELECT depname, empno, salary, avg(salary) OVER (PARTITION BY depname) FROM emps
 </programlisting>
 
 <screen>
-  depname  | empno | salary |          avg          
+  depname  | empno | salary |          avg
 -----------+-------+--------+-----------------------
  develop   |    11 |   5200 | 5020.0000000000000000
  develop   |     7 |   4200 | 5020.0000000000000000
@@ -394,7 +394,7 @@ FROM empsalary;
 </programlisting>
 
 <screen>
-  depname  | empno | salary | rank 
+  depname  | empno | salary | rank
 -----------+-------+--------+------
  develop   |     8 |   6000 |    1
  develop   |    10 |   5200 |    2
@@ -458,7 +458,7 @@ SELECT salary, sum(salary) OVER () FROM empsalary;
 </programlisting>
 
 <screen>
- salary |  sum  
+ salary |  sum
 --------+-------
    5200 | 47100
    5000 | 47100
@@ -487,7 +487,7 @@ SELECT salary, sum(salary) OVER (ORDER BY salary) FROM empsalary;
 </programlisting>
 
 <screen>
- salary |  sum  
+ salary |  sum
 --------+-------
    3500 |  3500
    3900 |  7400

doc/src/sgml/backup.sgml

@@ -929,7 +929,7 @@ SELECT * FROM pg_backup_stop(wait_for_archive => true);
      <filename>backup_label</filename> in the root directory of the backup. The
      third field should be written to a file named
      <filename>tablespace_map</filename> unless the field is empty. These files are
-     vital to the backup working and must be written byte for byte without 
+     vital to the backup working and must be written byte for byte without
      modification, which may require opening the file in binary mode.
     </para>
    </listitem>

doc/src/sgml/bloom.sgml

@@ -116,7 +116,7 @@ SELECT 10000000
    A sequential scan over this large table takes a long time:
 <programlisting>
 =# EXPLAIN ANALYZE SELECT * FROM tbloom WHERE i2 = 898732 AND i5 = 123451;
-                                              QUERY PLAN                                              
+                                              QUERY PLAN
 -------------------------------------------------------------------&zwsp;-----------------------------------
  Seq Scan on tbloom  (cost=0.00..2137.14 rows=3 width=24) (actual time=16.971..16.971 rows=0 loops=1)
    Filter: ((i2 = 898732) AND (i5 = 123451))
@@ -139,7 +139,7 @@ CREATE INDEX
  3976 kB
 (1 row)
 =# EXPLAIN ANALYZE SELECT * FROM tbloom WHERE i2 = 898732 AND i5 = 123451;
-                                              QUERY PLAN                                              
+                                              QUERY PLAN
 -------------------------------------------------------------------&zwsp;-----------------------------------
  Seq Scan on tbloom  (cost=0.00..2137.00 rows=2 width=24) (actual time=12.805..12.805 rows=0 loops=1)
    Filter: ((i2 = 898732) AND (i5 = 123451))
@@ -162,7 +162,7 @@ CREATE INDEX
  1584 kB
 (1 row)
 =# EXPLAIN ANALYZE SELECT * FROM tbloom WHERE i2 = 898732 AND i5 = 123451;
-                                                     QUERY PLAN                                                      
+                                                     QUERY PLAN
 -------------------------------------------------------------------&zwsp;--------------------------------------------------
  Bitmap Heap Scan on tbloom  (cost=1792.00..1799.69 rows=2 width=24) (actual time=0.388..0.388 rows=0 loops=1)
    Recheck Cond: ((i2 = 898732) AND (i5 = 123451))
@@ -195,7 +195,7 @@ CREATE INDEX
 =# CREATE INDEX btreeidx6 ON tbloom (i6);
 CREATE INDEX
 =# EXPLAIN ANALYZE SELECT * FROM tbloom WHERE i2 = 898732 AND i5 = 123451;
-                                                        QUERY PLAN                                                         
+                                                        QUERY PLAN
 -------------------------------------------------------------------&zwsp;--------------------------------------------------------
  Bitmap Heap Scan on tbloom  (cost=24.34..32.03 rows=2 width=24) (actual time=0.028..0.029 rows=0 loops=1)
    Recheck Cond: ((i5 = 123451) AND (i2 = 898732))

doc/src/sgml/charset.sgml

@@ -1574,13 +1574,13 @@ CREATE DATABASE korean WITH ENCODING 'EUC_KR' LC_COLLATE='ko_KR.euckr' LC_CTYPE=
 <screen>
 $ <userinput>psql -l</userinput>
                                          List of databases
-   Name    |  Owner   | Encoding  |  Collation  |    Ctype    |          Access Privileges          
+   Name    |  Owner   | Encoding  |  Collation  |    Ctype    |          Access Privileges
 -----------+----------+-----------+-------------+-------------+-------------------------------------
- clocaledb | hlinnaka | SQL_ASCII | C           | C           | 
- englishdb | hlinnaka | UTF8      | en_GB.UTF8  | en_GB.UTF8  | 
- japanese  | hlinnaka | UTF8      | ja_JP.UTF8  | ja_JP.UTF8  | 
- korean    | hlinnaka | EUC_KR    | ko_KR.euckr | ko_KR.euckr | 
- postgres  | hlinnaka | UTF8      | fi_FI.UTF8  | fi_FI.UTF8  | 
+ clocaledb | hlinnaka | SQL_ASCII | C           | C           |
+ englishdb | hlinnaka | UTF8      | en_GB.UTF8  | en_GB.UTF8  |
+ japanese  | hlinnaka | UTF8      | ja_JP.UTF8  | ja_JP.UTF8  |
+ korean    | hlinnaka | EUC_KR    | ko_KR.euckr | ko_KR.euckr |
+ postgres  | hlinnaka | UTF8      | fi_FI.UTF8  | fi_FI.UTF8  |
  template0 | hlinnaka | UTF8      | fi_FI.UTF8  | fi_FI.UTF8  | {=c/hlinnaka,hlinnaka=CTc/hlinnaka}
  template1 | hlinnaka | UTF8      | fi_FI.UTF8  | fi_FI.UTF8  | {=c/hlinnaka,hlinnaka=CTc/hlinnaka}
 (7 rows)

doc/src/sgml/datatype.sgml

@@ -3177,7 +3177,7 @@ CREATE TABLE person (
 );
 INSERT INTO person VALUES ('Moe', 'happy');
 SELECT * FROM person WHERE current_mood = 'happy';
- name | current_mood 
+ name | current_mood
 ------+--------------
  Moe  | happy
 (1 row)
@@ -3198,14 +3198,14 @@ SELECT * FROM person WHERE current_mood = 'happy';
 INSERT INTO person VALUES ('Larry', 'sad');
 INSERT INTO person VALUES ('Curly', 'ok');
 SELECT * FROM person WHERE current_mood > 'sad';
- name  | current_mood 
+ name  | current_mood
 -------+--------------
  Moe   | happy
  Curly | ok
 (2 rows)
 
 SELECT * FROM person WHERE current_mood > 'sad' ORDER BY current_mood;
- name  | current_mood 
+ name  | current_mood
 -------+--------------
  Curly | ok
  Moe   | happy
@@ -3214,7 +3214,7 @@ SELECT * FROM person WHERE current_mood > 'sad' ORDER BY current_mood;
 SELECT name
 FROM person
 WHERE current_mood = (SELECT MIN(current_mood) FROM person);
- name  
+ name
 -------
  Larry
 (1 row)
@@ -3253,7 +3253,7 @@ ERROR:  operator does not exist: mood = happiness
 <programlisting>
 SELECT person.name, holidays.num_weeks FROM person, holidays
   WHERE person.current_mood::text = holidays.happiness::text;
- name | num_weeks 
+ name | num_weeks
 ------+-----------
  Moe  |         4
 (1 row)
@@ -3982,7 +3982,7 @@ SELECT person.name, holidays.num_weeks FROM person, holidays
 <programlisting>
 SELECT macaddr8_set7bit('08:00:2b:01:02:03');
 <computeroutput>
-    macaddr8_set7bit     
+    macaddr8_set7bit
 -------------------------
  0a:00:2b:ff:fe:01:02:03
 (1 row)
@@ -4124,7 +4124,7 @@ SELECT 'a fat cat sat on a mat and ate a fat rat'::tsvector;
 
 <programlisting>
 SELECT $$the lexeme '    ' contains spaces$$::tsvector;
-                 tsvector                  
+                 tsvector
 -------------------------------------------
  '    ' 'contains' 'lexeme' 'spaces' 'the'
 </programlisting>
@@ -4135,7 +4135,7 @@ SELECT $$the lexeme '    ' contains spaces$$::tsvector;
 
 <programlisting>
 SELECT $$the lexeme 'Joe''s' contains a quote$$::tsvector;
-                    tsvector                    
+                    tsvector
 ------------------------------------------------
  'Joe''s' 'a' 'contains' 'lexeme' 'quote' 'the'
 </programlisting>
@@ -4165,7 +4165,7 @@ SELECT 'a:1 fat:2 cat:3 sat:4 on:5 a:6 mat:7 and:8 ate:9 a:10 fat:11 rat:12'::ts
 
 <programlisting>
 SELECT 'a:1A fat:2B,4C cat:5D'::tsvector;
-          tsvector          
+          tsvector
 ----------------------------
  'a':1A 'cat':5 'fat':2B,4C
 </programlisting>
@@ -4184,7 +4184,7 @@ SELECT 'a:1A fat:2B,4C cat:5D'::tsvector;
 
 <programlisting>
 SELECT 'The Fat Rats'::tsvector;
-      tsvector      
+      tsvector
 --------------------
  'Fat' 'Rats' 'The'
 </programlisting>
@@ -4197,7 +4197,7 @@ SELECT 'The Fat Rats'::tsvector;
 
 <programlisting>
 SELECT to_tsvector('english', 'The Fat Rats');
-   to_tsvector   
+   to_tsvector
 -----------------
  'fat':2 'rat':3
 </programlisting>
@@ -4239,17 +4239,17 @@ SELECT to_tsvector('english', 'The Fat Rats');
 
 <programlisting>
 SELECT 'fat &amp; rat'::tsquery;
-    tsquery    
+    tsquery
 ---------------
  'fat' &amp; 'rat'
 
 SELECT 'fat &amp; (rat | cat)'::tsquery;
-          tsquery          
+          tsquery
 ---------------------------
  'fat' &amp; ( 'rat' | 'cat' )
 
 SELECT 'fat &amp; rat &amp; ! cat'::tsquery;
-        tsquery         
+        tsquery
 ------------------------
  'fat' &amp; 'rat' &amp; !'cat'
 </programlisting>
@@ -4273,7 +4273,7 @@ SELECT 'fat:ab &amp; cat'::tsquery;
      to specify prefix matching:
 <programlisting>
 SELECT 'super:*'::tsquery;
-  tsquery  
+  tsquery
 -----------
  'super':*
 </programlisting>
@@ -4290,7 +4290,7 @@ SELECT 'super:*'::tsquery;
 
 <programlisting>
 SELECT to_tsquery('Fat:ab &amp; Cats');
-    to_tsquery    
+    to_tsquery
 ------------------
  'fat':AB &amp; 'cat'
 </programlisting>

doc/src/sgml/dblink.sgml

@@ -161,13 +161,13 @@ GRANT SELECT ON TABLE foo TO regress_dblink_user;
 \set ORIGINAL_USER :USER
 \c - regress_dblink_user
 SELECT dblink_connect('myconn', 'fdtest');
- dblink_connect 
+ dblink_connect
 ----------------
  OK
 (1 row)
 
 SELECT * FROM dblink('myconn', 'SELECT * FROM foo') AS t(a int, b text, c text[]);
- a  | b |       c       
+ a  | b |       c
 ----+---+---------------
   0 | a | {a0,b0,c0}
   1 | b | {a1,b1,c1}
@@ -1397,7 +1397,7 @@ dblink_get_notify(text connname) returns setof (notify_name text, be_pid int, ex
 
 <screen>
 SELECT dblink_exec('LISTEN virtual');
- dblink_exec 
+ dblink_exec
 -------------
  LISTEN
 (1 row)

doc/src/sgml/ddl.sgml

@@ -2619,13 +2619,13 @@ CREATE POLICY admin_local_only ON passwd AS RESTRICTIVE TO admin
 
 <programlisting>
 =&gt; SELECT current_user;
- current_user 
+ current_user
 --------------
  admin
 (1 row)
 
 =&gt; select inet_client_addr();
- inet_client_addr 
+ inet_client_addr
 ------------------
  127.0.0.1
 (1 row)

doc/src/sgml/fdwhandler.sgml

@@ -1089,7 +1089,7 @@ ExecForeignTruncate(List *rels,
      requested in the original <command>TRUNCATE</command> command,
      respectively.
     </para>
-    
+
     <para>
      If <literal>restart_seqs</literal> is <literal>true</literal>,
      the original <command>TRUNCATE</command> command requested the