diff --git a/doc/src/sgml/charset.sgml b/doc/src/sgml/charset.sgml
index 04e71f17d30..4b4563c5b9d 100644
--- a/doc/src/sgml/charset.sgml
+++ b/doc/src/sgml/charset.sgml
@@ -95,8 +95,8 @@ initdb --locale=sv_SE
 
     <informaltable>
      <tgroup cols="2">
-      <colspec colname="col1" align="left" colwidth="1*"/>
-      <colspec colname="col2" align="left" colwidth="3*"/>
+      <colspec colname="col1" colwidth="1*"/>
+      <colspec colname="col2" colwidth="3*"/>
       <tbody>
        <row>
         <entry><envar>LC_COLLATE</envar></entry>
@@ -995,13 +995,13 @@ CREATE COLLATION ignore_accents (provider = icu, locale = 'und-u-ks-level1-kc-tr
      <table id="charset-table">
       <title><productname>PostgreSQL</productname> Character Sets</title>
       <tgroup cols="7">
-       <colspec colname="col1" align="left" colwidth="3*"/>
-       <colspec colname="col2" align="left" colwidth="2*"/>
-       <colspec colname="col3" align="left" colwidth="2*"/>
-       <colspec colname="col4" align="left" colwidth="1.25*"/>
-       <colspec colname="col5" align="left" colwidth="1*"/>
-       <colspec colname="col6" align="left" colwidth="1*"/>
-       <colspec colname="col7" align="left" colwidth="2*"/>
+       <colspec colname="col1" colwidth="3*"/>
+       <colspec colname="col2" colwidth="2*"/>
+       <colspec colname="col3" colwidth="2*"/>
+       <colspec colname="col4" colwidth="1.25*"/>
+       <colspec colname="col5" colwidth="1*"/>
+       <colspec colname="col6" colwidth="1*"/>
+       <colspec colname="col7" colwidth="2*"/>
        <thead>
         <row>
          <entry>Name</entry>
@@ -1644,8 +1644,8 @@ RESET client_encoding;
     <table id="multibyte-translation-table">
      <title>Built-in Client/Server Character Set Conversions</title>
      <tgroup cols="2">
-      <colspec colname="col1" align="left" colwidth="1*"/>
-      <colspec colname="col2" align="left" colwidth="3*"/>
+      <colspec colname="col1" colwidth="1*"/>
+      <colspec colname="col2" colwidth="3*"/>
       <thead>
        <row>
         <entry>Server Character Set</entry>
@@ -1944,9 +1944,9 @@ RESET client_encoding;
     <table id="builtin-conversions-table">
      <title>All Built-in Character Set Conversions</title>
      <tgroup cols="3">
-      <colspec colname="col1" align="left" colwidth="2*"/>
-      <colspec colname="col2" align="left" colwidth="1*"/>
-      <colspec colname="col3" align="left" colwidth="1*"/>
+      <colspec colname="col1" colwidth="2*"/>
+      <colspec colname="col2" colwidth="1*"/>
+      <colspec colname="col3" colwidth="1*"/>
       <thead>
        <row>
         <entry>Conversion Name
diff --git a/doc/src/sgml/errcodes.sgml b/doc/src/sgml/errcodes.sgml
index f0ef0500339..861fa51f180 100644
--- a/doc/src/sgml/errcodes.sgml
+++ b/doc/src/sgml/errcodes.sgml
@@ -66,8 +66,8 @@
  <title><productname>PostgreSQL</productname> Error Codes</title>
 
  <tgroup cols="2">
-  <colspec colnum="1" colname="errorcode" align="left" colwidth="1*"/>
-  <colspec colnum="2" colname="condname" align="left" colwidth="8*"/>
+  <colspec colnum="1" colname="errorcode" colwidth="1*"/>
+  <colspec colnum="2" colname="condname" colwidth="8*"/>
   <spanspec namest="errorcode" nameend="condname" spanname="span12"/>
 
   <thead>
diff --git a/doc/src/sgml/features.sgml b/doc/src/sgml/features.sgml
index 330481ff6a1..e57488c422c 100644
--- a/doc/src/sgml/features.sgml
+++ b/doc/src/sgml/features.sgml
@@ -111,10 +111,10 @@
    <para>
     <informaltable>
      <tgroup cols="4">
-      <colspec colname="col1" align="left" colwidth="1.5*"/>
-      <colspec colname="col2" align="left" colwidth="1*"/>
-      <colspec colname="col3" align="left" colwidth="7*"/>
-      <colspec colname="col4" align="left" colwidth="3*"/>
+      <colspec colname="col1" colwidth="1.5*"/>
+      <colspec colname="col2" colwidth="1*"/>
+      <colspec colname="col3" colwidth="7*"/>
+      <colspec colname="col4" colwidth="3*"/>
       <thead>
        <row>
         <entry>Identifier</entry>
@@ -142,10 +142,10 @@
 
     <informaltable>
      <tgroup cols="4">
-      <colspec colname="col1" align="left" colwidth="1.5*"/>
-      <colspec colname="col2" align="left" colwidth="1*"/>
-      <colspec colname="col3" align="left" colwidth="7*"/>
-      <colspec colname="col4" align="left" colwidth="3*"/>
+      <colspec colname="col1" colwidth="1.5*"/>
+      <colspec colname="col2" colwidth="1*"/>
+      <colspec colname="col3" colwidth="7*"/>
+      <colspec colname="col4" colwidth="3*"/>
       <thead>
        <row>
         <entry>Identifier</entry>
diff --git a/doc/src/sgml/generate-keywords-table.pl b/doc/src/sgml/generate-keywords-table.pl
index a975b058d84..5aa1c39d2ab 100644
--- a/doc/src/sgml/generate-keywords-table.pl
+++ b/doc/src/sgml/generate-keywords-table.pl
@@ -56,11 +56,11 @@ print <<END;
  <title><acronym>SQL</acronym> Key Words</title>
 
  <tgroup cols="5">
-  <colspec colname="col1" align="left" colwidth="5*"/>
-  <colspec colname="col2" align="left" colwidth="3*"/>
-  <colspec colname="col3" align="left" colwidth="2*"/>
-  <colspec colname="col4" align="left" colwidth="2*"/>
-  <colspec colname="col5" align="left" colwidth="2*"/>
+  <colspec colname="col1" colwidth="5*"/>
+  <colspec colname="col2" colwidth="3*"/>
+  <colspec colname="col3" colwidth="2*"/>
+  <colspec colname="col4" colwidth="2*"/>
+  <colspec colname="col5" colwidth="2*"/>
   <thead>
    <row>
     <entry>Key Word</entry>