SDL: wikiheaders.pl: Whitespace fixes.

SDL Commits
1 
From 5753fd73c39a87e7f836bdebfea7a7776958dbec Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Wed, 24 Mar 2021 12:52:48 -0400
Subject: [PATCH] wikiheaders.pl: Whitespace fixes.

---
 build-scripts/wikiheaders.pl | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/build-scripts/wikiheaders.pl b/build-scripts/wikiheaders.pl
index dc332a819..a6422d409 100755
--- a/build-scripts/wikiheaders.pl
+++ b/build-scripts/wikiheaders.pl
@@ -427,6 +427,12 @@ sub usage {
     }
     close(FH);
 
+    foreach (keys %sections) {
+        $sections{$_} =~ s/\A\n+//;
+        $sections{$_} =~ s/\n+\Z//;
+        $sections{$_} .= "\n";
+    }
+
     if (0) {
         foreach (@section_order) {
             print("$fn SECTION '$_':\n");