i3bar: spelling fixes

i3bar/include/child.h

@@ -41,7 +41,7 @@ typedef struct {
 } i3bar_child;
 
 /*
- * Start a child-process with the specified command and reroute stdin.
+ * Start a child process with the specified command and reroute stdin.
  * We actually start a $SHELL to execute the command so we don't have to care
  * about arguments and such
  *
@@ -49,26 +49,26 @@ typedef struct {
 void start_child(char *command);
 
 /*
- * kill()s the child-process (if any). Called when exit()ing.
+ * kill()s the child process (if any). Called when exit()ing.
  *
  */
 void kill_child_at_exit(void);
 
 /*
- * kill()s the child-process (if any) and closes and
- * free()s the stdin- and sigchild-watchers
+ * kill()s the child process (if any) and closes and
+ * free()s the stdin- and SIGCHLD-watchers
  *
  */
 void kill_child(void);
 
 /*
- * Sends a SIGSTOP to the child-process (if existent)
+ * Sends a SIGSTOP to the child process (if existent)
  *
  */
 void stop_child(void);
 
 /*
- * Sends a SIGCONT to the child-process (if existent)
+ * Sends a SIGCONT to the child process (if existent)
  *
  */
 void cont_child(void);