Normalize nomenclature: marker row vs. delimiter row

The code for the table extension used the term 'marker row',
but the spec calls it 'delimiter row'.

This change normalizes the terminology so that it's consistent.

extensions/table.c

@@ -235,7 +235,7 @@ static cmark_node *try_opening_table_header(cmark_syntax_extension *self,
                                             unsigned char *input, int len) {
   cmark_node *table_header;
   table_row *header_row = NULL;
-  table_row *marker_row = NULL;
+  table_row *delimiter_row = NULL;
   node_table_row *ntr;
   const char *parent_string;
   uint16_t i;
@@ -244,16 +244,16 @@ static cmark_node *try_opening_table_header(cmark_syntax_extension *self,
     return parent_container;
   }
 
-  // Since scan_table_start was successful, we must have a marker row.
-  marker_row = row_from_string(self, parser,
-                               input + cmark_parser_get_first_nonspace(parser),
-                               len - cmark_parser_get_first_nonspace(parser));
+  // Since scan_table_start was successful, we must have a delimiter row.
+  delimiter_row = row_from_string(
+    self, parser, input + cmark_parser_get_first_nonspace(parser),
+    len - cmark_parser_get_first_nonspace(parser));
   // assert may be optimized out, don't rely on it for security boundaries
-  if (!marker_row) {
+  if (!delimiter_row) {
       return parent_container;
   }
-  
-  assert(marker_row);
+
+  assert(delimiter_row);
 
   cmark_arena_push();
 
@@ -263,30 +263,30 @@ static cmark_node *try_opening_table_header(cmark_syntax_extension *self,
   parent_string = cmark_node_get_string_content(parent_container);
   header_row = row_from_string(self, parser, (unsigned char *)parent_string,
                                (int)strlen(parent_string));
-  if (!header_row || header_row->n_columns != marker_row->n_columns) {
-    free_table_row(parser->mem, marker_row);
+  if (!header_row || header_row->n_columns != delimiter_row->n_columns) {
+    free_table_row(parser->mem, delimiter_row);
     free_table_row(parser->mem, header_row);
     cmark_arena_pop();
     return parent_container;
   }
 
   if (cmark_arena_pop()) {
-    marker_row = row_from_string(
+    delimiter_row = row_from_string(
         self, parser, input + cmark_parser_get_first_nonspace(parser),
         len - cmark_parser_get_first_nonspace(parser));
     header_row = row_from_string(self, parser, (unsigned char *)parent_string,
                                  (int)strlen(parent_string));
     // row_from_string can return NULL, add additional check to ensure n_columns match
-    if (!marker_row || !header_row || header_row->n_columns != marker_row->n_columns) {
-        free_table_row(parser->mem, marker_row);
+    if (!delimiter_row || !header_row || header_row->n_columns != delimiter_row->n_columns) {
+        free_table_row(parser->mem, delimiter_row);
         free_table_row(parser->mem, header_row);
         return parent_container;
     }
   }
 
   if (!cmark_node_set_type(parent_container, CMARK_NODE_TABLE)) {
     free_table_row(parser->mem, header_row);
-    free_table_row(parser->mem, marker_row);
+    free_table_row(parser->mem, delimiter_row);
     return parent_container;
   }
 
@@ -299,11 +299,11 @@ static cmark_node *try_opening_table_header(cmark_syntax_extension *self,
   parent_container->as.opaque = parser->mem->calloc(1, sizeof(node_table));
   set_n_table_columns(parent_container, header_row->n_columns);
 
-  // allocate alignments based on marker_row->n_columns
-  // since we populate the alignments array based on marker_row->cells
+  // allocate alignments based on delimiter_row->n_columns
+  // since we populate the alignments array based on delimiter_row->cells
   uint8_t *alignments =
-      (uint8_t *)parser->mem->calloc(marker_row->n_columns, sizeof(uint8_t));
-  cmark_llist *it = marker_row->cells;
+      (uint8_t *)parser->mem->calloc(delimiter_row->n_columns, sizeof(uint8_t));
+  cmark_llist *it = delimiter_row->cells;
   for (i = 0; it; it = it->next, ++i) {
     node_cell *node = (node_cell *)it->data;
     bool left = node->buf->ptr[0] == ':', right = node->buf->ptr[node->buf->size - 1] == ':';
@@ -347,7 +347,7 @@ static cmark_node *try_opening_table_header(cmark_syntax_extension *self,
       (int)strlen((char *)input) - 1 - cmark_parser_get_offset(parser), false);
 
   free_table_row(parser->mem, header_row);
-  free_table_row(parser->mem, marker_row);
+  free_table_row(parser->mem, delimiter_row);
   return parent_container;
 }
 

test/extensions.txt

@@ -208,7 +208,7 @@ fff | ggg | hhh | iii | jjj
 
 ### Table cell count mismatches
 
-The header and marker row must match.
+The header and delimiter row must match.
 
 ```````````````````````````````` example
 | a | b | c |