Various improvements to the colspec fixup script

Docs/Support/colspec-fix.pl:
  Various improvements, error checks and cleaning
   - Increased gutter size
   - Added check to ensure that total column % is not greater than 100%
   - Changed code to work with hacks to makeinfo
   - Ensure that total column width is less than max table width
   - Trim overly long end columns if needed

Docs/Support/colspec-fix.pl

@@ -9,7 +9,7 @@
 use strict;
 
 my $table_width  = 12.75;   # cm
-my $gutter_width =  0.09;   # cm
+my $gutter_width =  0.55;    # 2 mm
 
 my $str = join '', <>;
 
@@ -28,12 +28,17 @@ sub msg {
 }
 
 sub rel2abs {
-    my $str = shift;
-    my $colnum = 1;
+    my $str           = shift;
+    my $colnum        = 1;
     
-    my @widths = ();
-    my $total  = 0;
-    my $output = '';
+    my @widths        = ();
+    my $total         = 0;
+    my $output        = '';
+    
+    my $gutters;
+    my $content_width;
+    my $total_width;
+    my @num_cache;
     
     $str =~ /^(\s+)/;
     my $ws = $1;
@@ -43,12 +48,31 @@ sub rel2abs {
         push @widths, $1;
     }
 
-    my $unit = ($table_width - ($#widths * $gutter_width)) / ($total);
+    msg("!!! WARNING: Total Percent > 100%: $total%") if $total > 100;
+
+    if (! $total) {
+        die 'Something bad has happened - the script believes that there are no columns';
+    }
+
+    $gutters = $#widths * $gutter_width;
+    $content_width = $table_width - $gutters;
+    # Don't forget that $#... is the last offset not the count
 
     foreach (@widths) {
-        $output .= $ws . '<colspec colnum="'. $colnum .'" colwidth="'. sprintf ("%0.2f", $_ * $unit) .'cm" />' . "\n";
+        my $temp = sprintf ("%0.2f", $_/100 * $content_width);
+        $total_width += $temp;
+
+        if ($total_width > $content_width) {
+            $temp -= $total_width - $content_width;
+            msg("!!! WARNING: Column width reduced from " .
+                ($temp + ($total_width - $content_width)) . " to $temp !!!");
+            $total_width -= $total_width - $content_width;
+        }
+        
+        $output .= $ws . '<colspec colnum="'. $colnum .'" colwidth="'. $temp .'cm" />' . "\n";
         ++$colnum;
+        push @num_cache, $temp;
     }
-    
+   
     return $output . "\n$ws";
 }