[devel] Trim trailing blanks from sources and manual
diff --git a/pngvalid.c b/pngvalid.c
index ff78b22..139633a 100644
--- a/pngvalid.c
+++ b/pngvalid.c
@@ -6587,7 +6587,7 @@
       pm.test_gamma_sbit = 1;
       pm.test_gamma_strip16 = 1;
    }
-   
+
    else if (pm.ngammas == 0)
    {
       /* Nothing to test so turn everything off: */