[buffer/serialize] Minor renames in Ragel machines

As per my previous review on:
https://github.com/harfbuzz/harfbuzz/pull/2687
diff --git a/src/hb-buffer-deserialize-text.hh b/src/hb-buffer-deserialize-text.hh
index c437718..10cc160 100644
--- a/src/hb-buffer-deserialize-text.hh
+++ b/src/hb-buffer-deserialize-text.hh
@@ -402,24 +402,24 @@
 };
 
 static const char _deserialize_text_trans_actions[] = {
-	0, 0, 0, 0, 0, 1, 2, 0, 
-	2, 2, 3, 3, 3, 0, 2, 2, 
-	2, 0, 0, 2, 2, 2, 0, 0, 
-	2, 2, 2, 2, 2, 0, 0, 4, 
-	2, 2, 2, 0, 0, 5, 0, 6, 
-	5, 5, 0, 0, 0, 7, 7, 7, 
-	0, 8, 9, 9, 9, 8, 8, 0, 
-	0, 10, 11, 12, 11, 11, 13, 13, 
-	13, 7, 14, 14, 7, 15, 16, 15, 
-	15, 0, 10
+	0, 0, 0, 0, 1, 0, 2, 0, 
+	3, 3, 4, 4, 4, 0, 3, 3, 
+	3, 0, 0, 3, 3, 3, 0, 0, 
+	3, 3, 3, 3, 3, 0, 0, 5, 
+	3, 3, 3, 0, 0, 6, 7, 8, 
+	6, 6, 0, 0, 0, 9, 9, 9, 
+	0, 10, 11, 11, 11, 10, 10, 0, 
+	0, 12, 13, 14, 13, 13, 15, 15, 
+	15, 9, 16, 16, 9, 17, 18, 17, 
+	17, 0, 12
 };
 
 static const char _deserialize_text_eof_actions[] = {
 	0, 0, 0, 0, 0, 0, 0, 0, 
 	0, 0, 0, 0, 0, 0, 0, 0, 
-	0, 0, 0, 0, 5, 0, 0, 0, 
-	7, 7, 8, 0, 0, 8, 11, 13, 
-	13, 11, 7, 15, 15, 7, 8
+	0, 0, 0, 0, 6, 0, 0, 0, 
+	9, 9, 10, 0, 0, 10, 13, 15, 
+	15, 13, 9, 17, 17, 9, 10
 };
 
 static const int deserialize_text_start = 1;
@@ -429,7 +429,7 @@
 static const int deserialize_text_en_main = 1;
 
 
-#line 124 "hb-buffer-deserialize-text.rl"
+#line 132 "hb-buffer-deserialize-text.rl"
 
 
 static hb_bool_t
@@ -482,13 +482,20 @@
 		goto _again;
 
 	switch ( _deserialize_text_trans_actions[_trans] ) {
-	case 2:
+	case 1:
+#line 38 "hb-buffer-deserialize-text.rl"
+	{
+	memset (&info, 0, sizeof (info));
+	memset (&pos , 0, sizeof (pos ));
+}
+	break;
+	case 3:
 #line 51 "hb-buffer-deserialize-text.rl"
 	{
 	tok = p;
 }
 	break;
-	case 10:
+	case 12:
 #line 55 "hb-buffer-deserialize-text.rl"
 	{
   if (unlikely (buffer->content_type != HB_BUFFER_CONTENT_TYPE_GLYPHS))
@@ -502,7 +509,21 @@
   }
 }
 	break;
-	case 9:
+	case 7:
+#line 67 "hb-buffer-deserialize-text.rl"
+	{
+  if (unlikely (buffer->content_type != HB_BUFFER_CONTENT_TYPE_UNICODE))
+  {
+    if (buffer->content_type != HB_BUFFER_CONTENT_TYPE_INVALID) {
+    	buffer->clear();
+      return false;
+    }
+    assert (buffer->len == 0);
+    buffer->content_type = HB_BUFFER_CONTENT_TYPE_UNICODE;
+  }
+}
+	break;
+	case 11:
 #line 79 "hb-buffer-deserialize-text.rl"
 	{
 	if (!hb_font_glyph_from_string (font,
@@ -511,31 +532,30 @@
 	  return false;
 }
 	break;
-	case 6:
+	case 8:
 #line 86 "hb-buffer-deserialize-text.rl"
 	{if (!parse_hex (tok, p, &info.codepoint )) return false; }
 	break;
-	case 14:
+	case 16:
 #line 88 "hb-buffer-deserialize-text.rl"
 	{ if (!parse_uint (tok, p, &info.cluster )) return false; }
 	break;
-	case 4:
+	case 5:
 #line 89 "hb-buffer-deserialize-text.rl"
 	{ if (!parse_int  (tok, p, &pos.x_offset )) return false; }
 	break;
-	case 16:
+	case 18:
 #line 90 "hb-buffer-deserialize-text.rl"
 	{ if (!parse_int  (tok, p, &pos.y_offset )) return false; }
 	break;
-	case 12:
+	case 14:
 #line 91 "hb-buffer-deserialize-text.rl"
 	{ if (!parse_int  (tok, p, &pos.x_advance)) return false; }
 	break;
-	case 1:
-#line 38 "hb-buffer-deserialize-text.rl"
+	case 2:
+#line 51 "hb-buffer-deserialize-text.rl"
 	{
-	memset (&info, 0, sizeof (info));
-	memset (&pos , 0, sizeof (pos ));
+	tok = p;
 }
 #line 67 "hb-buffer-deserialize-text.rl"
 	{
@@ -550,7 +570,7 @@
   }
 }
 	break;
-	case 8:
+	case 10:
 #line 79 "hb-buffer-deserialize-text.rl"
 	{
 	if (!hb_font_glyph_from_string (font,
@@ -567,7 +587,7 @@
 	*end_ptr = p;
 }
 	break;
-	case 5:
+	case 6:
 #line 86 "hb-buffer-deserialize-text.rl"
 	{if (!parse_hex (tok, p, &info.codepoint )) return false; }
 #line 43 "hb-buffer-deserialize-text.rl"
@@ -579,7 +599,7 @@
 	*end_ptr = p;
 }
 	break;
-	case 7:
+	case 9:
 #line 88 "hb-buffer-deserialize-text.rl"
 	{ if (!parse_uint (tok, p, &info.cluster )) return false; }
 #line 43 "hb-buffer-deserialize-text.rl"
@@ -591,7 +611,7 @@
 	*end_ptr = p;
 }
 	break;
-	case 15:
+	case 17:
 #line 90 "hb-buffer-deserialize-text.rl"
 	{ if (!parse_int  (tok, p, &pos.y_offset )) return false; }
 #line 43 "hb-buffer-deserialize-text.rl"
@@ -603,7 +623,7 @@
 	*end_ptr = p;
 }
 	break;
-	case 11:
+	case 13:
 #line 91 "hb-buffer-deserialize-text.rl"
 	{ if (!parse_int  (tok, p, &pos.x_advance)) return false; }
 #line 43 "hb-buffer-deserialize-text.rl"
@@ -615,7 +635,7 @@
 	*end_ptr = p;
 }
 	break;
-	case 13:
+	case 15:
 #line 92 "hb-buffer-deserialize-text.rl"
 	{ if (!parse_int  (tok, p, &pos.y_advance)) return false; }
 #line 43 "hb-buffer-deserialize-text.rl"
@@ -627,7 +647,7 @@
 	*end_ptr = p;
 }
 	break;
-	case 3:
+	case 4:
 #line 38 "hb-buffer-deserialize-text.rl"
 	{
 	memset (&info, 0, sizeof (info));
@@ -650,7 +670,7 @@
   }
 }
 	break;
-#line 654 "hb-buffer-deserialize-text.hh"
+#line 674 "hb-buffer-deserialize-text.hh"
 	}
 
 _again:
@@ -662,7 +682,7 @@
 	if ( p == eof )
 	{
 	switch ( _deserialize_text_eof_actions[cs] ) {
-	case 8:
+	case 10:
 #line 79 "hb-buffer-deserialize-text.rl"
 	{
 	if (!hb_font_glyph_from_string (font,
@@ -679,7 +699,7 @@
 	*end_ptr = p;
 }
 	break;
-	case 5:
+	case 6:
 #line 86 "hb-buffer-deserialize-text.rl"
 	{if (!parse_hex (tok, p, &info.codepoint )) return false; }
 #line 43 "hb-buffer-deserialize-text.rl"
@@ -691,7 +711,7 @@
 	*end_ptr = p;
 }
 	break;
-	case 7:
+	case 9:
 #line 88 "hb-buffer-deserialize-text.rl"
 	{ if (!parse_uint (tok, p, &info.cluster )) return false; }
 #line 43 "hb-buffer-deserialize-text.rl"
@@ -703,7 +723,7 @@
 	*end_ptr = p;
 }
 	break;
-	case 15:
+	case 17:
 #line 90 "hb-buffer-deserialize-text.rl"
 	{ if (!parse_int  (tok, p, &pos.y_offset )) return false; }
 #line 43 "hb-buffer-deserialize-text.rl"
@@ -715,7 +735,7 @@
 	*end_ptr = p;
 }
 	break;
-	case 11:
+	case 13:
 #line 91 "hb-buffer-deserialize-text.rl"
 	{ if (!parse_int  (tok, p, &pos.x_advance)) return false; }
 #line 43 "hb-buffer-deserialize-text.rl"
@@ -727,7 +747,7 @@
 	*end_ptr = p;
 }
 	break;
-	case 13:
+	case 15:
 #line 92 "hb-buffer-deserialize-text.rl"
 	{ if (!parse_int  (tok, p, &pos.y_advance)) return false; }
 #line 43 "hb-buffer-deserialize-text.rl"
@@ -739,14 +759,14 @@
 	*end_ptr = p;
 }
 	break;
-#line 743 "hb-buffer-deserialize-text.hh"
+#line 763 "hb-buffer-deserialize-text.hh"
 	}
 	}
 
 	_out: {}
 	}
 
-#line 148 "hb-buffer-deserialize-text.rl"
+#line 156 "hb-buffer-deserialize-text.rl"
 
 
   *end_ptr = p;