Update mg_next_comma_list_entry.md

docs/c-api/util.h/mg_next_comma_list_entry.md

@@ -8,12 +8,12 @@ signature: |
 ---
 
 A helper function for traversing a comma separated list of values.
-It returns a list pointer shifted to the next value, or NULL if the end
+It returns a list pointer shifted to the next value or NULL if the end
 of the list found.
-Value is stored in val vector. If value has form "x=y", then eq_val
-vector is initialized to point to the "y" part, and val vector length
+The value is stored in a val vector. If the value has a form "x=y", then eq_val
+vector is initialised to point to the "y" part, and val vector length
 is adjusted to point only to "x".
-If list is just a comma separated list of entries, like "aa,bb,cc" then
+If the list is just a comma separated list of entries, like "aa,bb,cc" then
 `eq_val` will contain zero-length string.
 
 The purpose of this function is to parse comma separated string without