peek(1): more style fixes

src/peek.c

@@ -85,7 +85,7 @@ int main(int argc, char *argv[]){
 		}
 	}
 
-	{ /* install signal handler */
+	{ /* Install signal handler */
 		/* There isn't a difference in functionality between the signal(2) and
 		 * sigaction(2) methods. sigaction(2) is vastly preferred for
 		 * portability but some configurations can only use signal(2). */
@@ -101,7 +101,7 @@ int main(int argc, char *argv[]){
 #endif
 	}
 
-	/* Banish terminal echo; this terminates when it fails, because this is the
+	/* Banish terminal echo; this terminates when it fails, because it's the
 	 * whole point of the program. */
 	{
 		struct termios t;