Fix up commenting

examples/plot_task_dependencies.sh

 #!/bin/bash
 
-# Check that the required file is present
-if [ ! -e dependency_graph.dot ]
-then
-    echo "Missing task-graph output! Can generate figure."
+#  Creates a graphic from the task graph file dependency_graph.dot.
+#  Requires the graphviz command "dot".
+
+if [ ! -e dependency_graph.dot ]; then
+    echo "Missing task-graph output 'dependency_graph.dot'! Cannot generate figure."
 else 
     dot -Tpng dependency_graph.dot -o task_graph.png
+    echo "Output written to task_graph.png"
 fi
 
+exit

src/scheduler.c

@@ -128,7 +128,7 @@ void scheduler_write_dependencies(struct scheduler *s, int verbose) {
   /* Conservative number of dependencies per task type */
   const int max_nber_dep = 128;
 
-  /* Number of possibble relations between tasks */
+  /* Number of possible relations between tasks */
   const int nber_relation =
       2 * task_type_count * task_subtype_count * max_nber_dep;
 
@@ -146,7 +146,7 @@ void scheduler_write_dependencies(struct scheduler *s, int verbose) {
   /* Create file */
   char filename[200] = "dependency_graph.dot";
   FILE *f = fopen(filename, "w");
-  if (f == NULL) error("Error opening depenency graph file.");
+  if (f == NULL) error("Error opening dependency graph file.");
 
   /* Write header */
   fprintf(f, "digraph task_dep {\n");
@@ -159,7 +159,7 @@ void scheduler_write_dependencies(struct scheduler *s, int verbose) {
   for (int i = 0; i < s->nr_tasks; i++) {
     const struct task *ta = &s->tasks[i];
 
-    /* and theirs dependencies */
+    /* and their dependencies */
     for (int j = 0; j < ta->nr_unlock_tasks; j++) {
       const struct task *tb = ta->unlock_tasks[j];