add font mixins

sass/mixins/_mixins-master.scss

@@ -1,8 +1,18 @@
 @mixin font-1($weight) {
 	// see functions.php->google_fonts()
 	// and functions.php->_s_scripts()
-  font-family: "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI",
+	font-family:
-    Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
+		Montserrat,
+		-apple-system,
+		BlinkMacSystemFont,
+		"Segoe UI",
+		Roboto,
+		Oxygen-Sans,
+		Ubuntu,
+		Cantarell,
+		"Helvetica Neue",
+		sans-serif;
+
 	@if $weight == regular {
 		font-weight: 400;
 	} @else if $weight == bold {
@@ -10,29 +20,33 @@
 	} @else if $weight == extra-bold {
 		font-weight: 700;
 	} @else {
+
 		@error "font-weight #{$weight} not in valid font-weights for font-1: 'Montserrat'.";
 	}
 }
 
 @mixin font-body($weight: regular) {
+
 	@include font-1($weight);
 }
 
 @mixin font-title($weight: regular) {
+
 	@include font-1($weight);
 }
 
 @mixin font-link($weight: regular) {
+
 	@include font-1($weight);
 }
 
 @mixin font-code($weight: regular) {
-  font-family: $font-code;
+	font-family: $font__code;
 	font-weight: $weight;
 }
 
 @mixin font-pre($weight: regular) {
-  font-family: $font-pre;
+	font-family: $font__pre;
 	font-weight: $weight;
 }
 
@@ -45,6 +59,7 @@
 
 // Column width with margin
 @mixin column-width($numberColumns: 3) {
-  width: map-get($columns, $numberColumns) -
+	width:
+		map-get($columns, $numberColumns) -
 		(($columns__margin * ($numberColumns - 1)) / $numberColumns);
 }