small margin-bottom for btns that wrap

assets/css/bootswatch.min.css

-body{padding-top:50px}#banner{border-bottom:0}.page-header h1{font-size:4em}.bs-docs-section{margin-top:8em}.affix{top:70px}footer{margin:5em 0}footer li{float:left;margin-right:1.5em;margin-bottom:1.5em}footer p{margin-bottom:0;clear:left}.splash{padding:6em 0 2em;color:#fff;text-align:center;background:-webkit-linear-gradient(70deg,#080f1f 30%,#2b4b5a 87%,#435e67 100%);background:-o-linear-gradient(70deg,#080f1f 30%,#2b4b5a 87%,#435e67 100%);background:-ms-linear-gradient(70deg,#080f1f 30%,#2b4b5a 87%,#435e67 100%);background:-moz-linear-gradient(70deg,#080f1f 30%,#2b4b5a 87%,#435e67 100%);background:linear-gradient(20deg,#080f1f 30%,#2b4b5a 87%,#435e67 100%);background-attachment:fixed;background-color:#1c2533}.splash .alert{margin:4em 0 2em}.splash h1{font-size:4em}.splash #social{margin-top:6em}.section-tout{padding:4em 0 3em;background-color:#eaf1f1;border-top:1px solid rgba(255,255,255,0.1);border-bottom:1px solid rgba(0,0,0,0.1)}.section-tout .fa{margin-right:.5em}.section-tout p{margin-bottom:3em}.section-preview{padding:4em 0 4em}.section-preview .preview{margin-bottom:4em;background-color:#eaf1f1;border:1px solid rgba(0,0,0,0.1);border-radius:6px}.section-preview .preview .image{padding:5px}.section-preview .preview .image img{border:1px solid rgba(0,0,0,0.1)}.section-preview .preview .options{padding:0 2em 2em;text-align:center}.section-preview .preview .options p{margin-bottom:2em}.section-preview .dropdown-menu{text-align:left}.section-preview .lead{margin-bottom:2em}@media(max-width:767px){.section-preview .image img{width:100%}}.bsa .one .bsa_it_ad{background-color:transparent!important;border:none!important}.bsa .one .bsa_it_ad .bsa_it_t,.bsa .one .bsa_it_ad .bsa_it_d{color:inherit!important}.bsa .one .bsa_it_p{display:none}
+body{padding-top:50px}
+#banner{border-bottom:none}
+.page-header h1{font-size:4em}
+.btn{margin-bottom:3px}
+.bs-docs-section{margin-top:8em}
+footer{margin:5em 0}footer li{float:left;margin-right:1.5em;margin-bottom:1.5em}
+footer p{clear:left;margin-bottom:0}
+.splash{background-color:#1c2533;background:-webkit-linear-gradient(70deg, #080f1f 30%, #2b4b5a 87%, #435e67 100%);background:-o-linear-gradient(70deg, #080f1f 30%, #2b4b5a 87%, #435e67 100%);background:-ms-linear-gradient(70deg, #080f1f 30%, #2b4b5a 87%, #435e67 100%);background:-moz-linear-gradient(70deg, #080f1f 30%, #2b4b5a 87%, #435e67 100%);background:linear-gradient(20deg, #080f1f 30%, #2b4b5a 87%, #435e67 100%);background-attachment:fixed;padding:6em 0 2em;color:#fff;text-align:center}.splash .alert{margin:4em 0 2em}
+.splash h1{font-size:4em}
+.splash #social{margin-top:6em}
+.section-tout{padding:4em 0 3em;border-top:1px solid rgba(255,255,255,0.1);border-bottom:1px solid rgba(0,0,0,0.1);background-color:#eaf1f1}.section-tout .fa{margin-right:.5em}
+.section-tout p{margin-bottom:3em}
+.section-preview{padding:4em 0 4em}.section-preview .preview{margin-bottom:4em;background-color:#eaf1f1;border:1px solid rgba(0,0,0,0.1);border-radius:6px}.section-preview .preview .image{padding:5px}.section-preview .preview .image img{border:1px solid rgba(0,0,0,0.1)}
+.section-preview .preview .options{text-align:center;padding:0 2em 2em}.section-preview .preview .options p{margin-bottom:2em}
+.section-preview .dropdown-menu{text-align:left}
+.section-preview .lead{margin-bottom:2em}
+@media (max-width:767px){.section-preview .image img{width:100%}}
+.bsa .one .bsa_it_ad{border:none !important;background-color:transparent !important}.bsa .one .bsa_it_ad .bsa_it_t,.bsa .one .bsa_it_ad .bsa_it_d{color:inherit !important}
+.bsa .one .bsa_it_p{display:none}

assets/less/bootswatch.less

@@ -13,12 +13,12 @@ body {
 	}
 }
 
-.bs-docs-section {
-	margin-top: 8em;
+.btn {
+	margin-bottom: 3px;
 }
 
-.affix {
-	top: 70px;
+.bs-docs-section {
+	margin-top: 8em;
 }
 
 footer {